Nipple

Nipple (pronounced nip-uhl)

(1) In anatomy, the small, conical projection near the center of the areola of each mammary gland (breast); also called mamilla, papilla or teat.  In females, the nipple contains the outlets of the milk ducts.

(2) Something resembling (often in scaled-up form) a female’s nipple, as the mouthpiece of a nursing bottle or pacifier (in some places an informal word for a pacifier).

(3) Any device resembling a nipple in shape or function.

(4) A mechanical device through which liquids or gases can be passed in a regulated manner; as grease nipple a small drilled bush, usually screwed into a bearing (or other component needing periodic replenishment of a greasing agent) through which grease is introduced.

(5) In plumbing & gas-fitting, a short piece of pipe with threads on each end, used for joining valves.

(6) Any small physical protrusion on an automotive, a machine part or any other part that fits into a groove on another part (now rare).

(7) In computer (hardware) slang, the pointing device in the centre of the keyboard of certain laptops, partially fulfilling the functionality of a mouse, trackball or track-pad (although some (male) users insist it is called “the clit”).

(8) In pre-modern ballistics, a perforated segment that fits into part of the breech of a muzzle-loading gun, on which the percussion cap is fixed.

(9) In the design of bicycles, an internally threaded piece which holds a bicycle spoke in place on the rim.

(10) To fit (a baby's bottle etc) with a nipple (archaic).

(11) To give one's nipple to (a baby) to allow breastfeeding (archaic).

1520–1530: From the Middle English nipple, from the earlier neble, nibble, nible & nepil (all of which may be derived from nib & neb (tip; point).  The Old English nypel (elephant’s trunk) was formed analogously as “a protuberance from one's neb”.  The late twelfth century pap & pappe (nipple of a woman's breast) was first attested in Northern and Midlands writing, probably from a Scandinavian source (there’s no record in the Old Norse but there was the dialectal Swedish pappe), from the primitive Indo-European imitative root pap- (to swell), the source also of the Latin papilla (nipple) which may have influenced the English papula (a swelling, pimple) and the Lithuanian papas (nipple).  The spellings neple, nypil, nyppell, neapel, neaple, neble and all obsolete.  Nipple is a noun & verb, nippling is a verb and nippleless & nippled are adjectives; the noun plural is nipples.

One extinct verb which, perhaps surprisingly, wasn’t revived even after it became apparent trends of use on the internet suggested it might be helpful, was expapillate (bare the breasts to the nipples), identified by the outstandingly good Online Etymology Dictionary as an entry in an early English "dictionary", published in eleven editions between 1623 and the 1650s.  The book was neither a prescriptive or descriptive work encompassing the whole language but was described as “An Interpreter of Hard English Words”, an approach others later took including Wilfred Funk (1883–1965) in his Word Origins and Their Romantic Stories (1950), the idea being to focus on the less known or more obscure.  The construct of expapillate was ex- + papillate.  The ex- prefix was from the Middle English, from words borrowed from the Middle French, from the Latin ex (out of, from), from the primitive Indo-European eǵ- & eǵs- (out).  It was cognate with the Ancient Greek ἐξ (ex) (out of, from), the Transalpine Gaulish ex- (out), the Old Irish ess- (out), the Old Church Slavonic изъ (izŭ) (out) & the Russian из (iz) (from, out of).  The “x” in “ex-“, sometimes is elided before certain constants, reduced to e- (eg ejaculate).  The Latin papillate was the vocative masculine singular of papillātus (having nipples or buds; shaped like a nipple or bud) and was used in English as a transitive verb (to cover with papillae) and intransitive verb (to take the form of a papilla, or of papillae).

In 1974, The British Medical Journal (BMJ) used the term "guitar nipple" to describe "the irritation to the breast that can occur from the pressure of the guitar against the body."  That was indicative of the trend in the English-speaking world for newly-identified (and sometimes novel) conditions to be constructed with English elements, rather than the Latin historically used.  In the same spirit, two years later a contributor to the JAMA (Journal of the American Medical Association) was more imaginative still, coining "hot pants syndrome" when documenting cases in which a burn to the skin had been induced by a patient carrying a battery-powered transistor radio in the pocket of their trousers.  There was also in 1978 the New England Journal of Medicine's (NEJM) "disco digit" which referred to "a sore or infected finger caused by too much finger snapping while dancing."    

Jaguar tool kit supplied with 1966 E-Type (XKE, 1961-1974).  The grease gun (left) was used to force grease into various components through grease nipples.  This was a regular part of automobile maintenance until recent decades and is still a feature of the servicing schedules of heavy vehicles and machinery.

Until the 1970s, it was common for cars to need periodic “greasing” of certain components, a process which involved attaching a “grease gun” to a “grease nipple” which permanently was mounted on the relevant part; manually, the gun (usually a type of plunger) was used to force grease through the nipple.  This was undertaken either by owners, chauffeurs or mechanics at service stations who routinely would perform an “oil and grease” which included (all or some of): changing the engine, gearbox & differential oil, replacing the filter(s) and greasing all required grease points.  On more expensive vehicles, “one-shot lubrication” systems (known also as CLS (centralized lubrication systems) & ALS (automated lubrication systems)) were introduced during the 1920s, the technology adapted from the hardware used in aviation.  Although some attempts were made to create wholly automated systems, the most widely used were those which incorporated a foot pump for the driver to press at specified intervals; this action forced grease from a central reservoir to the required points.  Being a sealed system, this meant that nowhere in the system were grease nipples required (although some often still were included in components which demanded less frequent attention or were of a design which made their inclusion in the CLS plumbing too difficult.  ALS systems remain common in many places including heavy machinery, ships and the industrial plant used in factories, power plants etc.

The standard grease nipple used on the Jaguar E-Type (XKE) (left) and a diagram with a legend listing the E-Type's oil, brake fluid, transmission fluid and grease nipple locations.  The grease nipples are indicated by the obelus (†).  In automobiles, by the 1970s the need for multiple grease points or one-shot lubrication had begun to be eliminated (although some older designs maintained the legacy for decades) as advances in metallurgy and lubrication technology permitted the development of sealed, maintenance-free components which are “packed with grease" and thus “lubricated for life”.  However, for heavy-duty machines such as trucks and earth-moving equipment operating in adverse conditions, there are often still components demanding regular greasing and thus grease nipples are still a thing.

Also a thing is the “nipple orgasm”, at least for those for whom a nipple is a “hardwired erogenous zone” responsive to stimulation; that's a sub-set of the population and there are probably no reliable estimates of the prevalence.  Although in humans orgasms are typically thought an ejaculative, vaginal or clitoral phenomenon, sexologists list more than a dozen types, varying in instance or intensity based on the individual, the circumstances and sensitivity to stimulation.  When warming to the topic, these specialists will also discuss the details of “energetic orgasms” (which can, without physical touch, be triggered by meditation or fantasy) and “sleep orgasms”, said to have been experienced by an “estimated” 37% of women and 83% of men.  Quite how those numbers were obtained isn’t clear but helpfully, in 2011, New Jersey-based neuroscientist, psychotherapist & sex therapist Dr Nan Wise (b 1967) undertook a study to reveal how nipple stimulation affects the brain.  What Dr Wise wanted to build on was the existing understanding “…the clitoris, vagina and cervix are mapped on the genital sensory cortex”, something which sits between the brain’s two hemispheres and which she labels “hedonistic pleasure zone” or, more illustratively “the crotch of the brain”.

What Dr Wise did was have the study’s subjects stimulated with various mental fantasies while in an MRI (magnetic resonance imaging) machine, allowing her team to observe how distinct parts of the brain responded to various experiences.  The results were generally in line with expectations except that nipple stimulation proved an outlier.  While her hypothesis had been there would have been activity in the brain region associated with chest sensation (the theory being nipple orgasms might occur because stimulation of the organ releases oxytocin, a hormone that can cause uterine contractions, potentially leading to vaginal orgasm), instead it was found nipple stimulation activated the genital sensory cortex itself, leading Dr Wise to conclude: “The nipples are a hardwired erogenous zone, like the genitals, when nipples are stimulated, the brain gets activated, and regions processing the sensation communicate with those responsible for pleasure.”  This tied in with one of the accepted dictums in neuroscience: “neurons that fire together wire together” and the study’s findings do seem to suggest it is plausible there exists a neural pathway between the nipples and the genitals.  Sexologists however caution individual responses will vary and techniques which produce pleasing results for one will induce no response in others.  So, YMMV (your mileage many vary) and the sexologists recommend experimentation.

The SKIMS Nipple Bra

Wearing it well: Kim Kardashian in SKIMS "nipple bra"

The admirable (and much admired) Kim Kardashian (b 1980) in October 2023 announced the latest addition to her SKIMS product line: a bra with “built in” nipples, designed to be prominent enough obviously to protrude through clothing.  Said to offer the “ultimate shock factor” (although after the shocks of the last decade-odd, some of which those associated with Kardashian clan have instigated, that may be hyperbolic) the viewer response suggested many weren’t certain whether product was real or a gimmick designed to attract publicity.  It certainly attracted publicity but turned out to be real (with SKIMS part number).  Even if the concept wasn't as “innovative” as claimed, the promotional approach in the video certainly was, the spin being that if women can don a bra to emulate one of the more pleasing consequences of cold weather, the psychological effect might be they’ll be less inclined to turn on (or up) the air-conditioner, thus reducing energy use, thereby lowering carbon emissions, meaning a lesser contribution to the concentration of atmospheric CO₂ (and other greenhouse gasses) which causes accelerated climate change including higher temperatures.  That seems to be drawing a long bow but doubtlessly somewhere there will be published research which can be spun to support (or at least not disprove) each of the steps in the internal Kardashian logic.  It was certainly an example of the way commerce is attempting to monetize concerns about climate change.  

As Ms Kardashian put it: “The earth’s temperature is getting hotter and hotter. Sea levels are rising. The ice sheets are shrinking. I’m no scientist, but I believe everyone can do their skillset to do their part.  That’s why I’m introducing a brand-new bra with a built-in nipple so matter how hot it is, you’ll always look cold.  Some days are hard but these nipples are harder. And unlike the icebergs, these aren’t going anywhere.”  The bra was said to be available in six colors with a stated “10% of sales” (the exact math of that calculation not disclosed) to be a “one off donation” to 1% for the Planet (a multi-national collective of businesses pledged to gifting at least 1% of their annual revenue to “environmental causes”).  So it sounded like a real product with a real part-number (not then listed) but there were those who thought the release date being Halloween (October 31) might suggest it might not be wholly serious.  Even had it not been real, it would have been a good case-study for students of such things learning the craft of the promotional video clip, the only opportunity missed being Ms Kardashian should first have appeared in a scientist's white lab coat, peeling it off as she spoke the words "I'm no scientist".  The part-number's later appearance in the catalogue verified the availability.   

The 1970s: Rudi's sheer bra (left & right) and the original Nipple Bra.

It’s not a new idea.  In the early 1970s, several manufacturers advertised a line of bras with cups in a sheer fabric which offered coverage and support (within a limited mass range) but clung to the nipples' definition, the most celebrated being those of Austrian-born Rudolf "Rudi" Gernreich (1922–1985), remembered as the "designer" of the "monokini" (ie a bikini supplied without the top part).  This approach was for those who wanted to display the profile of their own nipples.  The "Nipple Bra" offered enhanced engineering was the ancestor of the SKIMS bra in that rather than using, as Herr Gernreich did, the human body's "built-in" nipples, it provided some.  The pitch all those decades ago was aimed at those who wanted to look “provocative” and in 1975 to achieve that the “Nipple Bra” cost US$20 (US$114.42 adjusted for 2023) so Ms Kardashian setting her price at US$120.00 seems not unreasonable.  The somewhat obtuse contribution to averting climate change aside, reaction to the product included the observation the bra will provide permanently “perfectly aligned nipples”, something not always achieved by the real things because, like most body parts, between left and right, there’s often some variation in size, shape, direction or distance from the ground.  Like many aspects of structural engineering, “perfect alignment” is achieved often with slight adjustments to variables like strap length.

Rudi not required: Lindsay Lohan displays perfect alignment, Venice Beach, Los Angeles, California, 2011.

In the United States, patent law exists to protect inventions, processes, and methods rather than abstract ideas and the general criteria (interpreted with some latitude) for eligibility is that an invention should be novel, non-obvious, and useful.  What does qualify is the implementation or embodiment of an idea in a tangible form so while a mere thought or concept can't be patented, a specific application or embodiment of that idea can be and this includes a new product, process, machine, or composition of matter.  Within all that, patents can be granted to cover improvements made to existing inventions.  Whether SKIMS have applied for or been granted a patent isn't clear but several for products in this vein have been granted over the last 50-odd years.  On 24 August 1976 Mr Jakob E. Schmidt of Charlestown, Indiana was granted U.S. patent #3976083 (Brassiere Having Simulated Nipples) as well as #4241737 & #4127128 covering “Brassiere Having Simulated Nipples and Attachable-Detachable Nipple Simulators”.

Conceptual drawing supplied with application for patent #3976083 (Brassiere Having Simulated Nipples), granted 24 August 1976.  The patent expired 24 August 1993.

The abstract filed with the application for #3976083 included: A brassiere is disclosed having cups which are provided with a nipple-like protuberance simulating the bulge of a natural nipple. The nipple-like bulge or protuberance may be a built-in component of the brassiere, usually situated under the fabric of the cup; a component which is permanently attached to the external surface of the brassiere cop; or an individual structure which may be attached to or detached from the brassiere cup as will, by means of several linkage and attachment mechanisms.  Simulated nipples for a brassiere would offer an acceptable compromise for ladies who do not wish to go without a brassiere and a welcome release from the subconscious effects of the suppression brought on by wearing brassieres of the types variously available, which obliterate the nipple.  That’s informative but Ms Kardashian might have phrased things in a more "Tik-Tok friendly" way. 

A nipple patch (left), the nipple patch writ large to function as a special-purpose bra (centre) and the advertising concept (right) which could be used by the manufacturers of either the "nipple bra" or the "nipple patch".  All that would be required is transposing the photographs, depending on whether the object was to display or conceal.

However, while one niche market will like the idea of being “so provocative”, there are others who find the sight of their own nipples “too provocative” and for this niche, there are ranges of products which offer coverage and concealment, smoothing away any suggestion of a nipple with patches which can be worn under bras with cups of even the most sheer fabric.  Self-adhesive (using a skin-friendly temporary glue), they can also be used without a bra and the same technology has been adapted to larger-scale units which actually function as a bra.  Marketed as being ideal to be used when wearing “backless” dresses or tops, they’re also said to be easier to use than the “fashion tape” (better known in the industry as “booby tape” or “tit tape”), especially if being self-applied.  Helpfully, if one changes one’s mind after having smoothed away the nipples, stick-on nipples are available in a range of styles and colors.

Piece from Miguel Castro Freitas’s “Stardust Aphrodite” collection for Mugler, Paris Fashion Week, October. 2025.

Miguel Castro Freitas’s (b 1980) first collection for Mugler was called “Stardust Aphrodite” and the designer described the pieces as “a trilogy of glorified clichés”, the three elements being (1) oversize and bulky, with big fluffy fabrics or shoulder pads, (2) severely tailored with extreme hourglass figures or (3) lightweight, sheer dresses; critics detected some overlap in the use of the motifs.  Although there were a number of nods to Mugler’s historic use of materials in bulk for dramatic effect, the collection otherwise tended to the “less”, one eye catching piece a gown with sparkly silver stars, its straps hung from bare-breasted nipple piercings.  To re-assure those whose toes had curled, critics noted that one was made from “a very lightweight fabric”.  The technique had be seen before, a “nipple grown” the best-remembered thing from the catwalk from one of Mugler’s shows in 1998 and this year’s model was an acknowledged homage but apart from that, it certainly was on-theme, Victoria’s Secret unlikely to see much business generated from those taken with Stardust Aphrodite.

A fragment from Fashion Feed’s take on Paris Fashion Week, 2025.

Of course the point of the catwalk is it makes it possible to see a garment in motion, interacting with the body.  That can be transformative: an outfit that on a hanger or mannequin seemed bland or lifeless can, when worn by a strutting model, come alive although equally, one which seemed admirable when static might reveal flaws of design or in construction once on the move.  Had the already infamous “nipple-piercing gown” been assessed purely on the technical criteria usually applied it would have been judged a success because the suspended sparkly chiffon flowed and swished as the designer knew it would but that achievement wasn’t much commented upon because the usual factions quickly were posting, the l'art pour l'art (art for art's sake) crowd calling the piece “an artistic vision” and dismissing criticism as the unwanted intrusion of a resurgent “purity culture” while those who disapproved called it “inappropriate” and yet another example of the way women’s bodies are exploited for the benefit of the “male gaze”.

One perhaps daring observation was that despite “many of the biggest names in women’s fashion being gay men… their designs often over-sexualise women instead of empowering them.”  Quite how much of the collective energy of gay men over the years been devoted to empowering women isn't known but Indian fashion commentator Pranjal Jain (b 2001) seemed to speak for her faction by adding that having a model parade “…a topless dress down the runway” and presenting it homage to the original of a quarter-century earlier was absurd because in the particular social & political context of the late 1990s such a dress could be understood as something “sensuous and provocative” but in 2025, “…what the fuck was the topless dress doing next to structured blazers and mini dresses?  I can tell you, the dress was a social media stunt engineered for virality.  Yet again, a man using a woman’s body for shock value.”  “Here”, she concluded, “is a perfect example of how fashion is political and historical, because context matters.”  As it has been for centuries, the critical deconstruction of frocks remains a serious matter.

Chappell Roan on the red carpet, Grammy Awards, Crypto.com Arena, Los Angeles, California, February 2026.  The rich auburn hair worked well with the hues of the gown and body art.

Even if Mugler’s “Stardust Aphrodite” didn’t at once migrate from the Paris catwalk to high street stores, the house didn’t abandon the motif and in February 2026, singer Chappell Roan (stage name of Kayleigh Rose Amstutz, b 1998) wore another of Mugler's interpretations (this time a burgundy gown) for the walk down the red carpet at the 68^th Annual Grammy Awards.  Predictably the event’s most publicized outfit, men everywhere doubtless were intrigued at the possibilities but the immediate reaction of women, regardless of their views of the aesthetic, may have been an involuntary curling of the toes as they imagined donning the gown.  That phenomenon is known as “mirror-touch synesthesia” which describes the experience when, upon observing another individual being touched or injured, a corresponding tactile or pain sensation is elicited in the anatomically matching location in the observer’s own body.  It’s very common but is a spectrum condition, most experiencing it as momentary sensation but in rare cases there have been patients for whom the effects have been long-lasting.  Technically, it’s triggered by a (usually temporary) reduction in the “self–other distinction” at the neural processing level, the causes thought to include (1) an heightened cross-activation between the visual and somatosensory cortices and (2) hyperactive or atypical functioning of the brain’s mirror neuron system.  There seems to be evidence an individual’s susceptibility to mirror-touch synesthesia is more significant in frequency of occurrence than the perception of the extent of the sensation (eg severity of an injury) witnessed.

Mirror-touch synesthesia is quite specific in its “virtual emulation” and differs from the vicarious responses (typically, a flinching when seeing someone suffer an injury) in being usually qualitatively stronger and manifested by a location-specific somatic sensation; it may run in parallel with emotional empathy (which happens typically without the literal bodily sensation) but is a separate phenomenon.  There are of course exceptions and the traditional (probably culturally obligatory) reaction of cricketers seeing a batsman struck “in the groin region” by a ball (delivered sometimes at 90 mph (145 km/h) or more) is one of mirth rather than empathy.

Drawing the lens: Chappell Roan photographed in front of the backdrop.

It would however seem the toes of mirror-touch synesthetes may uncurl because in the many photographs and video clips circulated, Ms Roan appeared not at all discomforted and the physics of that would have been determined by (1) the use of faux nipple piercings, (2) the lightweight fabric and (3) the gathering at the waist, ensuring each nipple had to bear the weight only of a few square inches of material.  No doubt pleased (if not surprised) by the interest generated, Ms Roan insisted it was not “that outrageous of an outfit”, adding “the look’s actually so awesome and weird” before concluding “I recommend just exercising your free will; it’s really fun and silly.”  The look was complimented with temporary body art, an extensive lace panel spread over her bare back with a pony on the chest, both credited to artist Jenny Collins of Puppy Puppy Playtime; the gold choker and earrings were by Buccellati.  Perhaps disappointing some, the outfit made only a one-off appearance on the red carpet, Ms Roan changing into something warmer when serving as an award-presenter.

Skims Ultimate Pierced Nipple Push-up Bra.

Of course, for such gowns to work (and that really is the correct expression), it relies on the wearer's nipples having appropriate fittings and these can be real (as body-piercings) or faux (attached with an adhesive or clamping device, the latter on the model of “clip-on” earrings).  However, what the use of light-weight fabrics should make possible is the material's attachment directly to the nipples with either a transparent surgical-grade glue or strategically placed double-sided tape ("boob-tape" or "tit-tape" in the jargon) but some of the effect would be lost because of the extent of the surface area of skin such adhesives would require.  More to the point, were it not done with genuine fittings (piercings or clamed-on), some of the “edginess” would be lost and it was this vibe Skims picked up on in the promotional video for “The Ultimate Pierced Nipple Push-up Bra”.  The tag line was: “Our sexiest bra gets even hotter with a faux nipple piercing design so you can get the ‘Ooo’ without the ouch!” and there’s no reason why, for certain events (if not the street), a Mugleresque gown couldn’t be hung from the bra’s fittings.  Done well, it could look good although Ms Jain likely would remain unimpressed.

Skims promotional video: “The Ultimate Pierced Nipple Push-up Bra”. 

Papilla

Papilla (pronounced puh-pil-uh)

(1) In anatomy, (1) a nipple-like protuberance on a part or organ of the body, (2) a vascular process of connective tissue extending into and nourishing the root of a hair, feather, or developing tooth, (3) any of the vascular protuberances of the dermal layer of the skin extending into the epidermal layer and often containing tactile corpuscles & (4) any of the small protuberances on the upper surface of the tongue often containing taste buds.

(2) In botany, a small fleshy projection on a plant; any minute blunt hair or process occurring in plants.

(3) In engineering and related fields, any small, nipple-like process or projection.

1400-1450: From the late Middle English, from the Latin papilla (a nipple, teat), the construct being papula (a pustule, pimple; a swelling) +‎ -illa (the diminutive nominal suffix).  Source of all was the primitive Indo-European imitative root pap (to swell).  From the anatomical beginnings, the meaning was extended to botany and mechanical engineering, the generalized meaning of a "nipple-like protuberance" attested from 1713, the sense of "a nipple of a mammary gland" documented from the 1690s.  The noun plural is papillae.

The derived forms include the noun papilloma (a tumor resembling a nipple) from 1866, a modern Latin hybrid, the construct being papilla (nipple) + the Ancient Greek oma (tumor), the adjective papillary (of, pertaining to, or resembling a nipple) from the 1660s, the noun papilledema (also papilloedema) (a non-inflammatory swelling of the optic disc) from 1908, from papilla + edema, from the New Latin edema, from Ancient Greek οἴδημα (oídēma) (swelling), from οἰδέω (oidéō) (I swell) and the noun pap (nipple of a woman's breast), a creation of the late twelfth century, a truncation of pappe, first attested in Northern and Midlands writing, probably from a Scandinavian source (not recorded in Old Norse but noted in the dialectal Swedish as pappe), from the primitive Indo-European imitative root pap (to swell), source also of the Latin papilla and the Lithuanian papas (nipple).  It’s speculative but pap is thought to be ultimately of infantile origin.

Variations of grease nipples.

Designed as entry points for lubricating oils, grease nipples are permanently installed by a threaded connection to which a grease gun attaches, the pressure supplied by the gun forcing a small captive bearing ball in the fitting to move back against the force of its retaining spring.  The valve that opens under pressure allows lubricant to pass through a channel and be forced into the voids of a bearing or whatever is to be lubricated and, when pressure ceases, the ball returns to its closed position.  The ball excludes dirt and functions as a check valve to prevent grease escaping back out of the fitting, functioning thus as a one-way, non-return valve.  The ball is almost flush with the surface of the fitting so that it can be wiped clean, reducing the debris which would otherwise be carried with the grease.  The convex shape of the fitting allows the concave tip of the grease gun to seal from many angles, yet with a sufficiently tight seal to force the pressured grease to move the ball and enter the fitting, rather than simply oozing past this temporary annular (ring-shaped) seal.  Grease nipples are commonly made from zinc-plated steel, stainless steel, or brass.

Lindsay Lohan static.

The patent for the first grease nipple was granted in 1929.  Before grease nipples existed, bearings were lubricated in ways that tended to be maintenance-intensive and often provided less effective lubrication.  For example, a typical machinery bearing of the nineteenth and early centuries was a plain bearing with a cross-drilled hole to receive oil or grease, with no fitting at its mouth, or at best a cap or cup.  Often lubricant was delivered under no more pressure than gravity or a finger push might provide; oil flowing into the hole, grease pushed in.  While grease guns existed to feed the grease with higher pressure, fittings were not as good and didn’t seal as well as those used than today, nor were they as widely used.

Lindsay Lohan moving.

Since the 1920s, the ever-growing dissemination of sealed bearings has made the use of grease fittings less common.  Sealed bearings are lubricated for life at the factory, sealed so lubricant is not lost or contaminated by fluids or anything abrasive.  Grease nipples however are far from obsolete; much machinery is built with them because, provided what is usually minimal maintenance is attended to, this type of bearing and lubrication setup is cost-effective, simple, and long-lasting.  However, neglect of maintenance does shorten a lifespan.  Grease fittings are rarely found on today's consumer goods because maintenance-free products have more sales appeal but they still exist on many automobiles and are more common still on industrial, agricultural, and mining equipment where shaft diameters exceed ¾ inch (19 mm) and in electric motors with an output greater than about 5 kw.  Grease nipples are particularly numerous on marine engines because, in addition to providing lubrication, pumping grease into a fitting on a motor or other unit exposed to water expels moisture that would otherwise cause corrosion.  This can be of critical importance in machinery exposed to salt-water.

Pump

Pump (pronounced puhmp)

(1) An apparatus or machine for raising, driving, exhausting, or compressing fluids or gases by means of a piston, plunger, or set of rotating vanes.

(2) An instance of the action of a pump; one stroke of a pump; any action similar to pumping.

(3) In engineering or building trades, a shore having a jackscrew in its foot for adjusting the length or for bearing more firmly against the structure to be sustained.

(4) In the slang of the biological sciences, an animal organ that propels fluid through the body; the heart.

(5) In cell biology, a system that supplies energy for transport against a chemical gradient, as the sodium pump for the transfer of sodium and potassium ions across a cell membrane.

(6) To raise, drive or free from fluids by means of a pump.

(7) To inflate something with a gas or viscous substance and used analogously in other contexts.

(8) To operate or move by an up-and-down or back-and-forth action.

(9) Several types of shoe, with much variation in the way the description is applied.

(10) In bodybuilding and climbing, a swelling of the muscles caused by increased blood flow following high intensity weightlifting; a specific type of exercise routine offered by gyms; as “pump iron” a generalised phrase to refer to weight-lifting.

(11) In colloquial use, a ride on a bicycle given to a passenger, usually on the handlebars or carrier (rare).

(12) In US slang, the heart, (obsolete).

(13) In (vulgar) UK slang, the vagina (obsolete).

(14) In the slang of (pre-pandemic) social interaction, vigorously to shake a hand (often as "pumping the flesh").

(15) In slang, as “pump for information”, relentlessly to question.

(16) In the slang of computer programming, to pass messages to a program so it may respond.

(17) In cosmetic surgery or non-surgical beauty treatment, as "pumped up", a general term to describe body parts (lips, breasts etc) made plumper with some artificial substance or the redistribution of the body’s natural fat deposits.

(18) In ballistics, as “pump-action”, a design which permits the rapid loading a shell or cartridge from a magazine.

1400-1450:  From the Late Middle English pumpe, cognate with Middle Low German pumpe and Middle Dutch pompe (water conduit, pipe).  Later variations were the Dutch pompen, the German pumpen, and the Danish pompe.  All are thought derived from the Spanish bomba of imitative origin, the source thought to be North Sea sailors, either an imperfect echoic or something imitative of the sound of the plunger in the water.  The earliest use in English was in reference to a device to raise and expel bilge water from ships and the Late Old French pompe probably is from something Germanic.  The mystery is that pumps are ancient machines so the late appearance in the Germanic word is odd in that no evidence has been found of a previous descriptive word.  The use as an "an act of pumping" is attested from the 1670s.  Pump & pumping are nouns & verbs, pumper is a noun, pumpy is a noun & adjective and pumped is a verb & adjective; the noun plural is pumps.

Pump-action, in reference to a type of repeating firearm equipped with a rapid loading mechanism is attested in advertisements from 1912 but it’s unknown whether this was an invention by a manufacturer or retailer or an adoption of existing slang.  The metaphoric extension in pump (someone) for information is from 1630s.  To pump iron as a term for the lifting of weights for fitness was first noted in 1972; pump-classes in gyms became popular in the 1990s although label wasn’t (virtually) universal until circa 2002.  The meaning “low shoe without fasteners" dates from the 1550s and is of unknown origin but was perhaps (very speculatively) echoic of the sound made when walking in them or, more plausibly, from Dutch pampoesje (type of sandal worn in the Dutch East Indies), derived from the Javanese pampoes and ultimately of Arabic origin.  Some sources propose a connection with pomp but it’s undocumented.  The name pump was applied to many shoes with a very low heel, convenient in situations where freedom of movement was required and thus preferred by dancers, couriers, acrobats, duellists and such.  In the shoe business, the definition soon wandered with differences noted between British and North American applications.

The now obsolete nineteenth century phrase “keep your toes in your pump” was dialectal for "stay calm, keep quiet, don't get excited", in the same sense as advice not to “get your knickers in a knot”, the latter which has survived.  In slang, to "be pumped" is (1) to be excited in anticipation of something, (2) having muscles in an engorged state following exercise, (3) in body-building, having muscles which have responded as expected to steroids or other drugs, (4) in rock-climbing, being severely fatigued, (5) in cosmetic surgery & certain non surgical treatments, having a fuller appearance (lips, breasts etc) by virtue of the insertion of implants or an injection of some chemical and (6) among models and other women, the sense of relief upon replacing fetching but uncomfortable shoes with a pair of welcoming and accommodating pumps.

Of pumping ship

Pumps are of great importance on ships because of the need quickly to be able to remove unwanted water from inside a hull.  At sea, when a ship is "taking on water", if pumps fail or the entry of water exceeds pumping capacity, a ship will become unstable and it may sink.  In the smallest vessels, hard-pumps are used while mechanical devices are installed on anything larger than a modest dinghy.  In admiralty jargon, the command “Pump Ship!” is an instruction to begin pumping with all pumps and, in the way sailors adapt such things, it entered naval vernacular as the phrase meaning “I intend to urinate”.

It was picked up by nautical types in civilian life but was probably unknown to most until the publication (in three volumes, 2021-2022) of the unexpurgated diaries of Sir Henry "Chips" Channon (1897–1958), a US-born English MP and socialite who quickly became "more English than the English".  Edited by Dr Simon Heffer (b 1960), the entry of interest was from 19 November 1936 when Channon hosted one of his many glittering dinners in the dining room designed by Parisian interior decorator Stéphane Boudin (1888–1967, his House of Jansen later decorating the White House for Jacqueline Kennedy (1929-1994; US First Lady 1961-1963)) and modelled on the interior of the Amalienburg, an eighteenth century hunting lodge in on the grounds of the Nymphenburg Palace Park outside Munich, a place notorious for the intricacy of its fittings, even by the standards of Rococo.  The Amalienburg was built for someone who would later be Holy Roman Emperor, just the sort of crew with whom Channon identified and he had the elaborate style replicated in the dining room of his London house in Belgrave Square, including even the Bavarian national colors of blue & silver.  Unfortunately, no color photographs appear to have survived and the room was later disassembled, the extendable mirrored table, which could expand to a length of 25 feet (7.7 m), occasionally offered at auction.  By all accounts, the room truly was “breathtaking” and it was one of the few things in life of which Channon could find no grounds for criticism, it living up to his expectation it would “shimmer in blue and silver” and “shock and stagger London”.  For that alone he seemed to think the Stg£6,000 (mostly money he had married) cost (some Stg£525,000 adjusted for 2023) well worth it.  To illustrate the relativities, the next year he would purchase a 7.3 litre (447 cubic inch) V12 Rolls-Royce Phantom III (1936-1939) for a sum (Stg£1900 for the chassis & another Stg£1100 to have a coach-builder fabricate a body) which would then have bought six houses in a middle-class London suburb although it’s not known if that’s something he’d have known, “middle class” being about the worst thing he could think to say of anyone.

Dining Room with table in eight-place configuration, 5 Belgrave Square, London, circa 1937.

On that November evening the guest of honor was King Edward VIII (1894–1972; King of the UK & Emperor of India January-December 1936, subsequently Duke of Windsor) and Channon noted in his diary his surprise at the monarch’s “modern” turn of phrase when he rose and announced “I want to pump shit.”  A dutiful host, Channon recorded he “…led His Majesty to our loulou! He proceeded to pass water without shutting the door, talking to me the while”.  That fragment of royal history was printed in the first volume (2021) of the published diaries (it was a measure of the deference which still applied in the England of 1965 that when first they appeared in heavily redacted form the passage was omitted) but comments soon appeared suggesting neither Channon nor Dr Heffer were well-acquainted with the sailors' slang the king would have learned during his brief naval career.  Dr Heffer responded by examining closely the original entry in the diarist’s hand and concluded the relevant character really was a “t” and not a “p” so the words on the night were either “misheard or misunderstood” and there’s little doubt what was said was “pump ship” and not “pump shit”.  He added that like Channon, he had “no naval connections” and was as thus just as “unfamiliar with the sea-dog slang” but that when the paperback edition was proofed, the text would be changed and an explanatory footnote (the diaries worth reading just for Heffer’s detailed footnotes) added.  Rising to the occasion, he observed this meant the “the hardback edition is destined to become a collector's item.”  The dinner proved the apogee of Channon’s social life because he’d backed the wrong royal horse, Edward VIII abdicating within weeks of having pumped ship in Belgrave Square.  

Of pumping breasts

Illustration of breast pump types by Pregnancy Birth & Baby.

Unambiguously, breast pumps do exactly what is said on the tin: They pump milk from the breasts.  Confounding the expectations of some, there is no direct correlation between breast size and the volume of milk produced; as a general principle, all else being equal (general health, stress levels, nutrition etc), the determining factor is the performance of the milk glands.  Breasts are comprised mostly of (1) glandular tissue (which produces milk) and (2) fatty tissue (which determines breast size), it being the glandular tissue which affects milk production, not the overall breast mass.  What most influences milk production is (1) Hormonal balance (prolactin and oxytocins the most significant), (2) the frequency of breast-feeding sessions (the more frequent the feeding (or pumping), the more milk the glands are instructed by the brain to produce (the process works on a supply-and-demand basis), (3) overall health and nutrition and (4), efficiency of latching to the nipple by the baby (inefficient latching can affect the supply & demand curve).  There is though some (sketchy) evidence to suggest women with larger breasts enjoy a greater “milk storage capacity” so, although they don’t produce more, they might have more of a “buffer”, meaning they can go longer between feeding or pumping.

Pumping on the move: A wearable breast pump set (supplied as a pair).

Breast pumps are devices to extract milk from the breasts and can be manually operated (hand pumps) or electric, both of which work by emulating the “sucking” technique of a baby, as opposed to the “hand expressing” method which is simply what for centuries milk-maids did when “milking the cows”.  Whether manual or electric, the basic design of a breast pump includes (1) a suction cup that fits over the nipple, (2) a tube through which the milk flows and (3) a collection bottle.  Generally, women use breast pumps for convenience, the advantage being they can “pump and store”, enabling them to give their babies the advantage of being fed with breast milk without being tied to the time-consuming activity of nursing.  Additionally, women often complain breast-feeding is tiring; to those who will never breast-feed, its sounds a pleasant relaxation rather than anything tiring but they all say it so it must be true.  Milk can be refrigerated and stored for months and there are now “milk banks” where those whose output is extraordinarily high can donate, their surplus output re-distributed to those with low production or who can for whatever reason not successfully breastfeed.  One recent innovation is the battery-powered “wearable pump”, worn inside the bra with the collection bottles directly attached.  Most sites recommend these are best suited to being worn at home, the advantage being one can, hands-free, go about one’s tasks.

Of Pumps, Courts and Flats

Lindsay Lohan in curved-heel stiletto pumps.

The homogenization of English was well-advanced long before the ubiquity of the internet but well into the twentieth century, different meanings for words could evolve in parallel in different regions of the same country, let alone between different states or provinces.  In British English, a court shoe was a woman’s shoe with a low cut vamp, sometimes with no instep fastening and otherwise adorned with a shoe buckle or a bow as an ostensible fastening.  In US English, such a shoe is a pump; pumps and court shoes may or may not have an ankle strap.  Pumps today, on either side of the Atlantic, are almost exclusively worn by women but historically were also formal shoes for men, the male variation called an opera slipper or patent pump.  For men, the pump gained ascendency over the dress boot as modern road-making techniques rendered cities less muddy places and dress pumps remained the standard for evening full-dress until the Second World War.  They remain the usual choice for black tie events and are obligatory with white-tie; the original design with steel-cut buckles, otherwise long extinct, still part of British court uniform and dress.

The construction of pumps is simple, using a whole-cut leather top with a low vamp, lined with either quilted silk or plain leather, trimmed with braid at the opening. The full leather sole is either glued onto the bottom, common on cheaper styles, or sewn, as on more costly bespoke styles still made traditionally, using a shallow slit to lift a flap of leather around the edge to recess and hide the stitching. The sole is, as on ordinary shoes, several layers of leather put together. The bow is made of grosgrain silk or rayon, in a pinched or flat form.  Pumps, which may have an ankle strap, if also constructed with a strap across the instep, are called Mary Janes.

Lindsay Lohan in ballet flats / pumps / slippers.  Ballet pumps in the UK, ballet flats in US English.

Most of the UK fashion business adopted the US use of pump because it simplified the mechanics of trade.  Otherwise, in the UK (and most of the Empire and Commonwealth) a pump implied a flat or low-heel ballet slipper or even rubber-soled canvas plimsolls.  Ballet slippers (now more often called flats) date from the medieval period, their popularity declining in only in the seventeenth century when higher heels became fashionable.  After a brief nineteenth century revival, heals again prevailed until the 1960s when they became suddenly and wildly popular after Brigitte Bardot (1934-2025) appeared in a pair of Rose Repetto’s (1907-1982 hand-stitched ballet flats.  These days, between heals and flats, it seems a draw although the trend increasingly to prefer the comfort of the flat as the years pass is noted.

Lindsay Lohan in kitten-heeled pumps.

Except for court dress, historic references or the exact (if not always enforced) rules for white-tie, there’s now less precision attached to the use of pump and the word should be thought of as referencing a range of closed and open-toed shoes, with and without straps, bows or buckles, the other useful modifier being some reference to the height or type of the heel.  This means anything from a modest kitten to an elongated stiletto and, depending on the airport at which one lands, a flat may be a ballet flat or a ballet pump.

In US use, pumps are exclusively women's shoes with a kitten or higher heel; flats are never pumps and Canada, always more influenced by US linguistic imperialism, followed; that influence is now almost universal and the notion of the flat pump, while not extinct, has declined.  Heels for pumps vary, from the kitten 1-2 inch (25-50 mm) to the stripper (200-250 mm), the bulk of stiletto sales in the 3-5 inch (75-125 mm) range.  They can be made from any material though the classic is patent leather and, under rules formalised by Donald Trump's (b 1946; US president 2017-2021 and since 2025) Miss Universe contests, white, stiletto pumps were once obligatory in the swimsuit section of beauty pageants.  Perhaps surprisingly to some, the swimsuits have survived much criticism as have the stilettos although they're no longer exclusively white and, open-toed and strappy, in most places they wouldn't be thought of as pumps.

Of the Holley Double Pumper

Even in an age when electronic fuel-injection (EFI) has long been the standard form of induction in ICEs (internal combustion engine), there remain silos in which the now arcane languages of carburetors are spoken and while there is some commonality of terms among the shortcuts, abbreviations & euphemisms of these vernaculars, a trained ear can pick the differences between the flavours to tell which dialect (SU, Weber, Holley, Rochester, Carter etc) is in play.  One part of the Holley tongue is “double pumper”.  A Holley double pumper is a four barrel carburettor with two accelerator pumps (the source of the moniker) and a mechanical linkage connecting the primary and secondary sides of the device.  Widely used during the classic era (1964-1974) of the US muscle cars, the main advantage of the design was the twin accelerator pumps prevented the transitory leanness in the fuel-air mixture which could happen during rapid throttle blade movements if only a single pump was fitted.  All multi-barrel carburetors use an accelerator pump circuit but many have only one feeding the primary barrel(s).  These pumps spray a quick shot of the mix to compensate for the split-second lag which will happen before the main circuit fully responds to a throttle pushed suddenly wide open.  All double pumper carburetors use an accelerator pump circuit on both the primary and the secondary sides.

Holley 850 CFM (cubic feet per minute) double pumper carburetor (part number 0-4781C) (left).  The double accelerator pump outlets for both the primary and secondary throttle bores are are arrowed (right), in this case on a HP (high-performance) version in which the choke housing has been removed to optimize the air inlet path, making it less suitable for street use but ideal for competition.

It’s important not to refer to vacuum secondary carburettors (VSC) as any sort of pumper.  A VSC uses a secondary opening controlled by a vacuum diaphragm which opens the secondary barrels only when there is sufficient airflow demand to require it so no accelerator pump is required on the secondary side.  So, a VSC is technically a “single pumper carburettor” but that term is never used and anyone referring to one as such will lose face.  There's also a point of etiquette of which to be aware.  While “VSC” is an accepted term, a double pumper is never referred to as a “DP” because use in the pornography industry has made “DP” exclusively their own and it seems mere politeness not to intrude on their noble linguistic traditions.

Weiland tunnel ram inlet manifold for big block Chevrolet V8 (396-402-427-454) with dual Holley 750 CFM double pumpers.  What the "tunnel ram" did was use the physics of fluid dynamics (ie of the fuel-air mix) to create a slight "forced induction" effect. 

There is an (unverified) industry legend that the "double buffer" terminology adopted in 1991 when Microsoft released version 4 of the Smart Drive (smartdrv.exe) disk cache was the coining of a coder who used a Holley Double Pumper in his (unspecified) muscle car.  That may or may not be true but "double buffer" lives on in the memory management of graphics processing units (GPU) as a description of the temporary storage areas in main memory where data is held during the transfer process.  The trick is that rather than processes being sequential, while program x is being read, program y can be written and vice versa.  It's not exactly quantum mechanics but means things simultaneously are happening in two places; for the gamers for whom GPUs are a fetish, every millisecond matters.