Gunk

Gunk (pronounced guhngk) 

(1) Any sticky or greasy residue or accumulation.

(2) A sub-culture of twenty-first century US males, combining elements of the modern gothic culture with punk rock.

(3) In mereology, any whole, the parts of which have further proper parts.

1949:  An Americanism, used to describe (usually dirty or unwanted) viscous substances, derived from Gunk, the trademark for a degreasing solvent, a thick liquid soap patented in 1932 by the AF Curran Company of Malden, Massachusetts.  Origin of the name is wholly speculative, the most likely offerings being (grime + funk) or (grime + junk).  Disgusting gunk has many synonyms:  quagmire, goo, silt, slime, muck, sludge, gunk, waste, debris, trash, powder, mud, mucus, grease, sediment, residue, grit, smoke, ash, dirt, oily, filth.

Gunk in Mereology

Gunk Engine Degreasant.

In mathematical logic and philosophy, mereology is the study of parts and the wholes they form.  Unlike set theory, the basis of which is the relation between a set and its elements, mereology is about the meronomic (part-whole relationships).  In mereology, gunk is any whole, the parts of which have parts and because parts are intrinsically transitive, any part of gunk must also be gunk, the implication of which is that gunk cannot contain any (indivisible) single-point parts.  So, for it to operate as it does, the known universe depends on gunky stuff like time.  Immediately controversial because of its challenges to nihilism, the term was first applied by Princeton philosopher David Lewis (1941-2001) in his 1991 publication, Parts of Classes.  Lewis claimed traces of the ideas could be found in writings from antiquity, through René Descartes (1596–1650) to Bertrand Russell (1872-1970); others found this lineage “arguable”.  Lewis’ mind worked in abstract space.  His construct of realism was (1) possible worlds exist, (2) every possible world does exist, (3) any possible world is wholly separate from any other and (4), our world is one of the possible worlds.

Herbie gunking Lindsay Lohan in Herbie: Fully Loaded (2005).