Cluster

Cluster (pronoubced kluhs-ter)

(1) A number of things of the same kind, growing or held together; a bunch.

(2) A group of things or persons close together.

(3) In US military use, a small metal design placed on a ribbon representing an awarded medal to indicate that the same medal has been awarded again (equivalent to UK & Commonwealth “bar”).

(4) In phonetics, a succession of two or more contiguous consonants in an utterance (eg the str- cluster of strap).

(5) In astronomy, a group of neighboring stars, held together by mutual gravitation, that have essentially the same age and composition and thus supposedly a common origin.

(6) In military ordnance, a group of bombs or warheads, deployed as one stick or in one missile, applied especially to fragmentation and incendiary bombs.

(7) In statistics, a naturally occurring subgroup of a population used in stratified sampling.

(8) In chemistry, a chemical compound or molecule containing groups of metal atoms joined by metal-to-metal bonds; the group of linked metal atoms present.

(9) In computer software, a file system shared by being simultaneously mounted on multiple servers.

(10) In computer hardware, two or more computers working at the same time, each node with its own properties yet displayed in the network under one host name and a single address.

(11) A collective noun for mushrooms (troop is the alternative).

Pre 900: From the Middle English cluster (bunch), from the Old English cluster & clyster (cluster, bunch, branch; a number of things growing naturally together), from the Proto-Germanic klus- & klas- (to clump, lump together) + the Proto-Germanic -þrą (the instrumental suffix), related to the Low German Kluuster (cluster), the dialectal Dutch klister (cluster), the Swedish kluster (cluster) and the Icelandic klasi (cluster; bunch of grapes).  All the European forms are probably from the same root as the noun clot.  The meaning "a number of persons, animals, or things gathered in a close body" is from circa 1400, the intransitive sense, "to form or constitute a cluster," is attested from the 1540s; the use in astronomy dating from 1727.  Cluster is a noun & verb; clustery is an adjective, clustered is an adjective & verb, clustering is a noun, adjective & verb and clusteringly is an adverb; the noun plural is clusters.  The specialized technical words include the adjective intercluster (and inter-cluster) & the noun subcluster (and sub-cluster).

Clusters various

Cluster is a (slang) euphemism for clusterfuck; drawn from US military slang, it means a “bungled or confused undertaking”.  The cluster which the slang references is the cluster bomb, a canister dropped usually from an aircraft which opens to release a number of explosives over a wide area, thus the sense of something that becomes a really big mess.  Cluster bombs began widely to be used during the Second World War, the first deployed being the two-kilogram German Sprengbombe Dickwandig (SD-2) (butterfly-bomb).  The US, UK, USSR and Japan all developed such weapons, described in typical military tradition by an unmemorable alpha-numeric array of part-numbers, the battlefield slang then being "firecracker" or "popcorn" and it wasn’t until 1950 that “cluster bomb” was first used by the manufacturers and another ten years before the term came into general use.

However, the informal compound clusterfuck was at first rather more literal, emerging in 1966 meaning “orgy” or some similar event in which intimacy was enjoyed between multiple participants.  The sense of it referencing a “bungled or confused undertaking” started only in 1969, first noted among US troops in Vietnam who, with some enthusiasm, used it both as a graphic criticism of military tactics and the entire US strategy in the Far East.  The standard military euphemism is "Charlie Foxtrot”.

There are alternative etymologies for clusterfuck but neither has attracted much support, one being it was coined in the 1960s by hippie poet Ed Sanders as “Mongolian Cluster Fuck” and this may have been an invention independent of the military use.  The other is said to date from the Vietnam War and have been the creation of soldiers critical of the middle-management of the army, the majors and lieutenant colonels, those responsible for supply and logistics, aspects of war for millennia the source of many military problems.  The insignia for each of these ranks (respectively in gold or silver), is a small, round oak-leaf cluster, hence the notion when there's a screw up in the supply chain, it's a clusterfuck.  It's a good story but etymologists have doubts about the veracity.

Students learning English are taught about euphemisms and the vital part they play in social interaction.  They are of course a feature of many languages but in English some of these sanitizations must seem mysterious and lacking any obvious connection with what is being referenced.  There are also exams and students may be asked both to provide a definition of “euphemism” and an example of use and a good instance of the latter is what to do when a situation really can be described only as “a clusterfuck” or even “a fucking clusterfuck” but circumstances demand a more “polite” word.  So, students might follow the lead of Australian Federal Court Judge Michael Lee (b 1965) in Lehrmann v Network Ten Pty Limited [2024] FCA 369 who in his 420 page judgment declared the matter declared “an omnishambles”. The construct of that was the Latin omni(s) (all) + shambles, from the Middle English schamels (plural of schamel), from the Old English sċeamol & sċamul (bench, stool), from the Proto-West Germanic skamul & skamil (stool, bench), from the Vulgar Latin scamellum, from the Classical Latin scamillum (little bench, ridge), from scamnum (bench, ridge, breadth of a field).  In English, shambles enjoyed a number of meanings including “a scene of great disorder or ruin”, “a cluttered or disorganized mess”, “a. scene of bloodshed, carnage or devastation” or (most evocatively), “a slaughterhouse”.  As one read the judgement one could see what the judge was drawn to the word although, in the quiet of his chambers, he may have been thinking “clusterfuck”.  Helpfully, one of the Murdoch press’s legal commentators, The Australian’s Janet Albrechtsen (b 1966; by Barry Goldwater out of Ayn Rand) who had been one of the journalists most attentive to the case, told the word nerds (1) omnishambles dated from 2009 when it was coined for the BBC political satire The Thick Of It and (2) endured well enough to be named the Oxford English Dictionary’s (OED) 2021 Word of the Year.  The linguistic flourish was a hint of things to come in what was one of the more readable recent judgments.  If a student cites “omnishambles” as a euphemism for “clusterfuck”, a high mark is just about guaranteed.

Knight’s Cross of the Iron Cross with Oak leaves & Swords (1957 version).  These “de-nazified” awards were first issued by the Federal Republic of Germany (the FRG or West Germany) in 1957 and were awarded only to members of the Wehrmacht entitled to such awards.  Production of these awards ceased in 1986.

German law since the end of World War II generally have prohibited individuals from wearing the swastika but in 1957, under pressure from the newly (1955) reconstituted armed forces (the Bundeswehr (literally "Federal Defense")), the Gesetz über Titel, Orden und Ehrenzeichen (legislation concerning titles, orders and honorary signs) was amended, authorizing the replacement of Nazi-era Knight's Crosses with items with an oak leaf cluster in place of the swastika, essentially identical to the Imperial Iron Cross of 1914.

Lindsay Lohan at the Falling for Christmas (Netflix, 2022) premiere, New York City, November 2022.

The dress was a Valentino sequined embroidered floral lace column gown with jewel neck, long sleeves and concealed back zip.  It was worn with a gold Valentino Rockstud Spike shoulder bag in crackle-effect metallic nappa leather, complemented with Stephanie Gottlieb jewelry including diamond cluster earrings in 18k white gold and a heart shaped yellow sapphire ring with pavé diamonds.

Tuft

Tuft (pronounced tuhft)

(1) A bunch or cluster of small, usually soft and flexible parts, as feathers or hairs, attached or fixed closely together at the base and loose at the upper ends.

(2) A cluster of short, fluffy threads, used to decorate cloth, as for a bedspread, robe, bath mat, or window curtain.

(3) A cluster of cut threads, used as a decorative finish attached to the tying or holding threads of mattresses, quilts, upholstery, etc.

(4) To furnish or decorate with a tuft or tufts; to arrange in a tuft or tufts.

(5) In the upholstery trade, to draw together (a cushion or the like) by passing a thread through at regular intervals, the depressions thus produced being usually ornamented with tufts or buttons.  Tufts are not merely decorative because they secure and strengthen mattresses, quilts, cushions et al; they act to hinder the movement of the stuffing.

(6) In botany, a small clump of trees or bushes.

(7) A gold tassel on the cap once worn by titled undergraduates at English universities, one of the more blatant class identifiers if the UK’s class system; the word tuft was also applied to those entitled to wear such as tassel and from this use evolved the slang "toff".

1350-1400: From the Middle English toft & tofte (bunch of soft and flexible things fixed at the base with the upper ends loose), an alteration of earlier tuffe (which endures in the Modern English tuff), from the Old French touffe, tuffe, toffe & tofe (tuft of hair (and source of the modern French touffe)), from the Late Latin tufa (a crest on a helmet (also found in Late Greek toupha) and probably of Germanic origin (the Old High German was zopf and the Old Norse was toppr (tuft, summit).  The earlier European forms were the Old English þūf (tuft), the Old Norse þúfa (mound), the Swedish tuva (tussock; grassy hillock), from the Proto-Germanic þūbǭ (tube) & þūbaz.  It was akin to the Latin tūber (hump, swelling) and the Ancient Greek τῡ́φη (tū́phē) (cattail (used to stuff beds)).  The excrescent t (as in against) was an English addition and tuft was used as a verb from the 1530s.  In some contexts, bunch, cluster, collection, cowlick, group, knot, plumage, ruff, shock, topknot & tussock can impart a similar meaning but tuft is better for its specific purpose.  Tuft & tufting are nouns & verbs, tufted is a verb & adjective, tufter is a noun, tuftier & tuftiest are adjectives, tufty is a noun & adjective and tuftily is an adverb; the noun plural is tufts.

Little Miss Muffet in Hell.

The 1550s noun tuffet (little tuft) was from the Old French touffel (the diminutive suffix -et replacing the French -el) which was a diminutive of touffe.  In English the word is obsolete except for the use in the nursery rhyme Little Miss Muffet which seems to have first appeared in print in 1805 although it (and variations) may have been circulating much earlier.

Little Miss Muffet
Sat on a tuffet,
Eating her curds and whey;
There came a big spider,
Who sat down beside her
And frightened Miss Muffet away.

Etymologists believe Little Miss Muffet’s tuffet was a grassy hillock or a small knoll in the ground (a variant spelling of an obsolete meaning of tuft).  The latter-day use to refer to a hassock or footstool is an example of how (usually obscure) words can acquire meanings if erroneous definitions are often repeated and come to serve some purpose.  Tuffet for example became a favorite of antique dealers who are apt to call both footstools and low seats “tuffets”, a handy practice perhaps when provenance is doubtful.

Lindsay Lohan in bed with tufted bedhead.

Critics of interior design tend not to approve of padded or tufted headboards and the shinier or more pillowy the effect, the greater will be the disparagement.  Such critics probably tend to prefer a minimalist aesthetic and condemn anything which doesn’t conform as outdated, excessive or just in poor taste but that aside, there are practical reasons to avoid the padding because the material can over time collect dust, dirt, and oils, something of concern to allergy sufferers.  The designs can also provide hiding places for the dreaded bed bugs.  Still, there are some who like the “generic luxury hotel room” look and argue they’re a kind of safety feature, banging one’s head on some tufted padding a less troubling event than an impact with one of Ikea’s hard, flat surfaces.  Like any bed, there are advantages and drawbacks, some thing made more comfortable, some close to impossible.

Nobleman in full dress at Cambridge (1815) with golden tuft.

The noun toff began as mid nineteenth century lower-class London slang for "a stylish dresser, a man of the smart set".  It was an alteration of tuft, which was a mid-eighteenth century English university (Oxford & Cambridge) term for students who were members of the aristocracy, a reference to the gold ornamental tassel (or tufts) worn on the academic caps (mortarboards) of undergraduates.  Throughout the “long eighteenth century” (a historian’s term which refers for the epoch running from the Glorious Revolution of 1688 to the Congress of Vienna in 1815 (the “long nineteenth” being 1815-1914 and the “long twentieth” 1914-2001 (ie 9/11))), undergraduates at both Oxford and Cambridge were differentiated into four classes: (1) noblemen, (2) gentlemen, (3) commoner-scholars (fellow-commoners at Cambridge) & (4) servitors (sometimes known at Cambridge as sizars and at Oxford as battelers).  Each of these classes of undergraduates was entitled to a different form of dress, noblemen since 1490 (further clarified in 1576) entitled to wear silk and brocaded gowns of bright colors. Such rich materials emphasized noble status, as did the costly dyes. The gowns had flap collars, Tudor bag sleeves with gold lace decorations (akin to the black lace decorations used today on Oxford gimp gowns) and a velvet round cap with a gold tassel (or tuft) was worn.  Noblemen were technically (if misleadingly) nobiles minorum gentium and included the sons of bishops, knights and baronets and, by resolution of Convocation, could include heirs of esquires.

The right to wear the golden tuft was briefly restricted to those with fathers entitled to sit in the House of Lords while those less blue-blooded were allowed only to a plain black tassel but things gradually became less exclusive until the practice was abandoned in the late nineteenth century but the transfer of sense was inevitable: wearers of golden tufts came to be known as tufts.  Those toadies or sycophants (and there were many) who were slavish followers of the tufts were tufthunters and their antics, tufthunting, such individuals and their habits quite identifiable to this day.  By the 1850s, under the influence of the cockney accent, the word had been transformed into toff (some dictionaries of slang noting toft co-existed in the 1850s but this may have been a mishearing) which endures to refer to anyone rich and powerful although the original sense was of someone apparently well-bred.

1912 Stutz Bear Cat (1912-1934); after 1913 they would be dubbed Bearcat (left) and 1915 Rolls-Royce Silver Ghost (Chassis 2BD, 40/50; 1906-1926) limousine by H.A. Hamshaw (right).

One of the fastest and most admired American cars of the early era, the Stutz Bearcat assumed such a place in popular culture, it was was claimed that should anyone die at the wheel of a Stutz Bearcat, they were granted an obituary in the New York Times (NYT).  Wholly apocryphal, the origin of the romantic myth is thought to be related to the Bearcat being a symbol of wealth, adventure, and daring, owned by the sort of chaps (such a lifestyle at the time was most associated with men although women adventurers were not unknown) who would likely anyway warrant an NYT obituary.  The Bear Cat's tufted leather upholstery was typical (though not universal) of the high priced automobiles of the time although already, elaborate fabrics were appearing in vehicles with enclosed passenger compartments which afforded protection from the elements.  The appointments of 1915 Rolls-Royce Silver Ghost were opulent even by the coachbuilding standards of the day (the Edwardian traditions still maintained) but the chauffeur's compartment lacked a roof (the body style really a Sedanca de Ville as were many of the early English "limousines") so was still trimmed in tufted leather.  The more sheltered passengers enjoyed carved ivory door handles, beveled glass windows, cut crystal lamps, an inlaid wood folding table, two jump seats, and door pockets, communications to the chauffeur via a tubular intercom.  The lavish upholstery in the rear was tufted, beige West-of-England cloth with embroidered silk window pulls and trim-work, including rear compartment shades and sliding divider although what usually attracts most comment is the elegant, pleated, cloth rosette headliner with its cloudlike billows.   To make journeys more pleasant, a set of leather-wrapped flasks was mounted in the right rear armrest.      

1972 Oldsmobile Ninety Eight Regency advertising.

Tufted leather upholstery was common in early automobiles, the seating often exactly the same as those used in horse-drawn carriages, houses or commercial buildings (and certainly gentlemen's clubs).  The practice faded as production volumes increased and as early as the late 1920s was coming to be restricted to only the most expensive models.  This exclusivity tended to prevail until 1972 when Oldsmobile introduced the Regency option for its full-sized Ninety-Eight (sometimes as "98") models, a package, the visual highlight of which was tufted "loose-pillow" velour upholstery (although unlike the use in furniture where the "pillows" were detachable for cleaning, in the Ninety-Eight they were fixed permanently to the seats.  Suddenly, solidly middle-class Oldsmobile (right in the middle of General Motors’ (GM) five-step (Chevrolet-Pontiac-Oldsmobile-Buick-Cadillac) hierarchy; the so-called "Slone ladder" designed to both facilitate and encourage "upward automotive mobility" conceived by Alfred P Sloan (1875–1966;  president of General Motors (GM) 1923-1937 and Chairman of the Board 1937-1946)) had brought both velour and loose-pillow seating to the masses.  The velour was at the time admired by most buyers (though derided by some critics of design) and as tufted upholstery began to proliferate in the industry it was usually offered as a cheaper alternative to leather.  In some climates the velour was probably the better choice and was welcomingly comfortable although in some of the more strident shades of red could recall the popular idea of how a bordello might be furnished.  Presumably, those who'd never enjoyed a visit to a bordello were more disconcerted than regular customers.

1974 Imperial LeBaron four-door hardtop (left) in chestnut tufted leather though not actually “fine Corinthian leather” which was (mostly) exclusive to the Cordoba (1975-1983) until late 1975 when not only did the Imperial's brochures mention "genuine Corinthian leather (available at extra cost)" but for the first time since 1954 the range was referred to as the "Chrysler Imperial", a harbinger the brand was about to be retired.  Imperial's advertising copy noted of the brochure photograph above: “...while the passenger restraint system with starter interlock is not shown, it is standard on all Imperials.”; the marketing types didn't like seat-belts messing up their photos.  While all of the big three (GM, Ford & Chrysler) had tufted interiors in some lines, it was Chrysler which displayed the most commitment to the motif.

1977 Chrysler (Australia) Valiant Regal SE.

In the era, Chrysler's Australian outpost did cut a few corners when implementing the “pillowed look”, economies achieved by (1) using fewer buttons for the tufting of the fabric or optional leather and (2) attaching the tufted “feature sections” directly to the cushion squab rather than creating an emulated “pillowed” look which appeared to sit atop the structure.  Even by the time of the release of the CL range (1976-1978) the feeling was the writing was on the wall for the once popular Australian Valiant (1962-1981) and the top-of-the-line Regal SE was created in the Q&D (quick & dirty) way by including all the less Regal’s options as standard equipment; only the tufted upholstery and optional leather was unique to the model.  Sales were modest but there remained devoted following for the Valiant which was durable enough to endure the sometimes harsh environment and it was highly regarded for its towing capabilities.  Built on the US A-body platform, when production ended in 1981 it had lasted a half-decade longer than the Plymouth and Dodge versions sold in the home market and only in Mexico would use continue until 1988.

1974 Cadillac Fleetwood Talisman.

Oldsmobile's move was as audacious and influential as Ford’s introduction in 1965 of the up-market LTD which, like the Regency package, had the effect of cannibalizing sales from other divisions within the same corporation.  Cadillac, although with a range priced considerably above Oldsmobile, offered nothing with such an ostentatious interior though when it did in 1974 respond with its Talisman package (1974-1976), it made sure it did so with more tufted extravagance still, in 1974 offering leather as well as velour.  The trend the Regency package started would last over twenty years and is remembered especially for the tufted fittings used in Imperials, Chryslers and Dodges, the hides used in the Cordoba range (1975-1983) said to be "fine Corinthian leather", an advertising agency creation which meant nothing in particular but sounded vaguely European and therefore expensive.  Cadillac called the fabric in the Fleetwood Talisman "Medici crushed velour" which had about the same relationship to historic truth as "fine Corinthian leather" but the package sold well over the three seasons it was offered, despite the option costing almost as much (and the leather significantly more) as some new cars.  Among collectors, the holy grail is a 1974 Fleetwood Talisman trimmed in blue leather; although it was on the option list, none has ever been sighted and the factory's records don't breakdown production between the blue and the alternative "medium saddle" (a medium tan), some of which have been verified.

1985 Cadillac Eldorado Biarritz (left), 1977 Chrysler New Yorker Brougham (centre) and 1989 Cadillac Fleetwood Brougham d' Elegance (right).  Color choice made a big difference to the perception of the "tufted look", more subdued hues like green and blue less confronting than the "bordello red" which became emblematic of the industry's phase.

Conglomerate & Agglomerate

Conglomerate (pronounced kuhn-glom-er-it or kuhng-glom-er-it (noun & adjective) and kuhn-glom-uh-reyt or kuhng-glom-uh-reyt (verb))

(1) Anything composed of heterogeneous materials or elements; mass.

(2) A corporation consisting of a number of subsidiary companies or divisions in a variety of unrelated industries, usually as a result of merger or acquisition.

(3) A coarse-grained sedimentary rock consisting of round rock fragments cemented together by hardened silt, clay, calcium carbonate, or a similar material. The fragments (clasts) have a diameter of at least 2 mm (0.08 inches), vary in composition and origin, and may include pebbles, cobbles, boulders, or fossilized seashells. Conglomerates often form through the transportation and deposition of sediments by streams, alluvial fans, and glaciers.

(4) Gathered into a rounded mass; consisting of parts so gathered; clustered.

(5) Consisting of heterogeneous parts or elements.

(6) Of or relating to a corporate conglomerate.

(7) In geology, of the nature of a conglomerate.

(8) To bring together into a cohering mass.

(9) To gather into a ball or rounded mass.

1565–1575: From the Latin conglomerātus, past participle of conglomerāre (to roll-up), from glomerāre (to wind into a ball), the construct being con- + glomer- (stem of glomus) (ball of yarn or thread) + -ātus (-ate).  The prefix con- was from the Middle English con-, from the Latin con-, from the preposition cum (with), from the Old Latin com, from the Proto-Italic kom, from the primitive Indo- European ḱóm (next to, at, with, along).  It was cognate with the Proto-Germanic ga- (co-), the Proto-Slavic sъ(n) (with) and the Proto-Germanic hansō.  It was used with certain words to add a notion similar to those conveyed by with, together, or jointly or with certain words to intensify their meaning and, later, to indicate being made from or bringing together of several objects.  The suffix -ate was a word-forming element used in forming nouns from Latin words ending in -ātus, -āta, & -ātum (such as estate, primate & senate).  Those that came to English via French often began with -at, but an -e was added in the fifteenth century or later to indicate the long vowel.  It can also mark adjectives formed from Latin perfect passive participle suffixes of first conjugation verbs -ātus, -āta, & -ātum (such as desolate, moderate & separate).  Again, often they were adopted in Middle English with an –at suffix, the -e appended after circa 1400; a doublet of –ee.  Related forms include conglomeratic, conglomeritic, conglomerated, conglomerating, conglomerateur, conglomeration & conglomeratize.

Agglomerate (pronounced uh-glom-uh-reyt (adjective & noun) and uh-glom-er-it (noun))

(1) To collect or gather into a cluster or mass.

(2) Gathered together into a cluster or mass.

(3) In botany, crowded into a dense cluster, but not cohering.

(4) In geology, a mass of angular volcanic fragments united by heat; distinguished from conglomerate.

(5) In meteorology, an ice-cover of floe formed by the freezing together of various forms of ice.

1675-1685: From the Latin agglomerātus, past participle of agglomerāre, the construct being ad- (to) + -glomerāre (to wind or add into a ball), from glomus (a ball; a mass), from globus (genitive glomeris), (a ball of yarn) of uncertain origin.  Related forms are the adjective agglomerative, the nouns agglomerator & agglomeration and the verbs (used with or without object), agglomerated & agglomerating.  The intransitive sense "grow into a mass" dates from 1730.

Conglomerate rocks (left) are those compose of mostly rounded, gravel-size clasts, a matrix of finer grained sediments, such as sand, silt or compressed clay filling the gaps between the clasts, the form held together with calcium carbonate, iron oxide, silica, or hardened clay which acts as a natural cement.  Agglomerate rocks (right) are large, coarse fragments associated with the lava flow ejected during explosive volcanic eruptions.  Although they resemble sedimentary conglomerates, agglomerates consist almost wholly of angular or rounded lava fragments of varying size and shape. Fragments are usually poorly sorted in a matrix, or appear in a mix of volcanic dust or ash that has turned to stone.

An agglomeration of Lindsay Lohan magazine covers.

Bob

Bob (pronounced bobb)

(1) A short, jerky motion.

(2) Quickly to move up and down.

(3) In Sterling and related currencies, a slang term for one shilling (10c); survived decimalisation in phrases like two bob watch, still used by older generations).

(4) A type of short to medium length hairstyle.

(5) A docked horse’s tail.

(6) A dangling or terminal object, as the weight on a pendulum or a plumb line.

(7) A short, simple line in a verse or song, especially a short refrain or coda.

(8) In angling, a float for a fishing line.

(9) Slang term for a bobsled.

(10) A bunch, or wad, especially a small bouquet of flowers (Scottish).

(11) A polishing wheel of leather, felt, or the like.

(12) An affectionate diminutive of the name Robert.

(13) To curtsy.

(14) Any of various hesperiid butterflies.

(15) In computer graphics (especially among demosceners), a graphical element, resembling a hardware sprite, that can be blitted around the screen in large numbers.

(16) In Scotland, a bunch, cluster, or wad, especially a small bouquet of flowers.

(17) A walking beam (obsolete).

1350–1400: From the Middle English bobben (to strike in cruel jest, beat; fool, make a fool of, cheat, deceive), the meaning "move up and down with a short, jerking motion," perhaps imitative of the sound, the sense of mocking or deceiving perhaps connected to the Old French bober (mock, deride), which, again, may have an echoic origin. The sense "snatch with the mouth something hanging or floating," as in bobbing for apples (or cherries), is recorded by 1799 and the phrase “bob and weave” in boxing commentary is attested from 1928.  Bob seems first to have been used to describe the short hair-style in the 1680s, a borrowing probably of the use since the 1570s to refer to "a horse's tail cut short", that derived from the earlier bobbe (cluster (as of leaves)) dating from the mid fourteenth century and perhaps of Celtic origin and perhaps connected in some way with the baban (tassel, cluster) and the Gaelic babag.  Bob endures still in Scots English as a dialectical term for a small bunch of flowers.

The group of bob words in English is beyond obscure and mostly mysterious.  Most are surely colloquial in origin and probably at least vaguely imitative, but have long become entangled and merged in form and sense (bobby pin, bobby sox, bobsled, bobcat et al).  As a noun, it has been used over the centuries in various senses connected by the notion of "round, hanging mass," and of weights at the end of a fishing line (1610s), pendulum (1752) or plumb-line (1832).  As a description of the hair style, although dating from the 1680s, it entered popular use only in the 1920s when use spiked.  As a slang word for “shilling” (the modern 10c coin), it’s recorded from 1789 but no connection has ever been found.  In certain countries, among older generations, the term in this sense endures in phrases like “two bob watch” to suggest something of low quality and dubious reliability.

UK Prime Minister Lord Salisbury (Robert Arthur Talbot Gascoyne-Cecil, 1830–1903; UK Prime Minister for thirteen years variously 1885-1902 (prime-minister since "God knows when" in Churchill's words)).

The phrase "Bob's your uncle" is said often to have its origin in the nepotism allegedly extended by Lord Salisbury to his favorite nephew Arthur Balfour (1848–1930; UK Prime Minister 1902-1905), unexpectedly promoted to a number of big jobs during the 1880s.  The story has never convinced etymologists but it certainly impressed the Greeks who made up a big part of Australia's post-war immigration programme, "Spiro is your uncle" in those years often heard in Sydney and Melbourne to denote nepotism among their communities there.

The other potential source is the Scottish music hall, the first known instance in in a Dundee newspaper in 1924 reviewing a musical revue called Bob's Your Uncle.  The phrase however wasn't noted as part of the vernacular until 1937, six years after the release of the song written by JP Long, "Follow your uncle Bob" which alluded to the nepotistic in the lyrics:

Bob's your uncle
Follow your Uncle Bob
He knows what to do
He'll look after you

Partridge's Dictionary of Slang and Unconventional English (1937) notes the phrase but dates it to the 1890s though without attribution and it attained no currency in print until the post-war years.  Although it's impossible to be definitive, the musical connection does seem more convincing, the connection with Lord Salisbury probably retrospective.  It could however have even earlier origins, an old use noted in the Canting Dictionary (1725) in an entry reporting "Bob ... signifies Safety, ... as, It's all Bob, ie All is safe, the Bet is secured."

Of hair

A bob cut or bob is a short to shoulder-length haircut for women.  Historically, in the west, it’s regarded as a twentieth-century style although evidence of it exists in the art of antiquity and even some prehistoric cave-paintings hint it may go way back, hardly surprising given the functionality.  In 1922, the Times of London, never much in favor of anything new, ran a piece by its fashion editor predicting the demise of the fad, suggesting it was already passé (fashion editors adore the word passé).  Certainly, bobs were less popular by the 1930s but in the 1960s, a variety of social and economic forces saw a resurgence which has never faded and the twenty-first century association with the Karen hasn't lessened demand (although the A-line variant, now known in the industry as the "speak to the manager" seems now avoided) and the connection with the Karen is the second time the bob has assumed some socio-political meaning; when flaunted by the proto-feminists of the 1920s, it was regarded as a sign of radicalism.  The popularity in the 1920s affected the millinery trades too as it was the small cloche which fitted tightly on the bobbed head which became the hat of choice.  Manufacturer of milliner's materials, hair-nets and hair-pins all suffered depressed demand, the fate too of the corset makers, victims of an earlier social change and one which would in the post-war years devastate the industries supporting the production of hats for men.

Variations on a theme of bob, Marama Corlett (b 1984) and Lindsay Lohan, Sick Note, June 2017.

Hairdressers have number of terms for the variations.  The motifs can in some cases be mixed and even within styles, lengths can vary, a classic short bob stopping somewhere between the tips of the ears and well above the shoulders, a long bob extending from there to just above the shoulders; although the term is often used, the concept of the medium bob really makes no sense and there are just fractional variations of short and long, everything happening at the margins.  So, a bob starts with the fringe and ends being cut in a straight line; length can vary but the industry considers shoulder-length a separate style and the point at which bobs stop and something else begins.  Descriptions like curly and ringlet bobs refer more to the hair than the style but do hint at one caveat, not all styles suit all hair types, a caution which extends also to face shapes.

Asymmetrical Bob: Another general term which describes a bob cut with different lengths left and right; can look good but cannot (or should not) be applied to all styles.   

A-line bob: A classic bob which uses slightly longer strands in front, framing the face and, usually, curling under the chin; stylists caution this doesn’t suit all face shapes.

Buzz-cut bob: Known also as the undercut (pixie) bob, and often seen as an asymmetric, this is kind of an extreme inverted mullet; the the usual length(s) in the front and close-cropped at the back.  It can be a dramatic look but really doesn’t suit those above a certain BMI or age.

Chin-length bob: Cut straight to the chin, with or without bangs but, if the latter is chosen, it’s higher maintenance, needing more frequent trims to retain the sharpness on which it depends.  Depending on the face shape, it works best with or without fringe.

Inverted bob: A variation on the A-line which uses graduated layers at the back, the perimeter curved rather than cut straight. Known also as the graduated bob, to look best, the number of layers chosen should be dictated by the thickness of growth.

Shaggy bob: A deliberately messy bob of any style, neatness depreciated with strategic cutting either with scissors or razor, a styling trick best done by experts otherwise it can look merely un-kept.  The un-kept thing can be a thing if that’s what one wants but, like dying with gray or silver, it's really suitable only for the very young.  Some call this the choppy and it’s known in the vernacular of hairdressing as the JBF (just been fucked).

Spiky bob: This differs from a JBF in that it’s more obviously stylised.  It can differ in extent but with some types of hair is very high maintenance, demanding daily application of product to retain the directions in which the strands have to travel.    

Shingle bob: A cut tapered very short in the back, exposing the hairline at the neck with the sides shaped into a single curl, the tip of which sits at a chosen point on each cheek.  This needs to be perfectly symmetrical or it looks like a mistake.

Shoulder-length bob: A blunt bob that reaches the shoulders and has very few layers; with some hair it can even be done with all strands the same length.  Inherently, this is symmetrical.

Speak to the manager bob: Not wishing to lose those customers actually named Karen, the industry shorthand for the edgy (and stereotypically in some strain of blonde) bob didn’t become “Karen”.  The classic SttM is an asymmetric blonde variation of the A-line with a long, side-swept fringe contrasted with a short, spiky cut at the back and emblematic of the style are the “tiger stripes”, created by the chunky unblended highlights.  It's now unfashionable though still seen.