Answer: gunk

AnswerCrossword Clue
GUNKMuck
gunkany sticky or greasy matter
gunkto cause something to be gunky sticky
GUNKSlop
GUNKThick, messy substance
GUNKSlimy crud
GUNKIcky residue
GUNKResidue in a bathtub drain
GUNKEngine buildup
GUNKSticky matter
GUNKUnwanted buildup
GUNKCrud
GUNKGoo
GUNKGreasy stuff
GUNKSticky mess.
GUNKSludge: Slang.
GUNKGreasy goo
GUNKGooey dirt
GUNKSticky stuff
GUNKSludgy stuff
GUNKEngine fouler
GUNKSticky residue
GUNKGreasy dirt
GUNKMessy stuff
GUNKGoop
GUNKSticky goo
GUNKOil filter accumulation
GUNKThick, messy stuff
GUNKGreasy glop
GUNKSlime
GUNKIcky stuff
GUNKGreasy residue