Answer: slime

AnswerCrossword Clue
SLIME

Yucky stuff

SLIME

Gooey mess

SLIME

Viscous stuff

SLIME
Scoundrels, so to speak
SLIME
Muck
SLIMEOozy gunk
SLIME"Ghostbusters" hazard
SLIME"Ghostbusters" gunk
SLIMENo-goodnik
SLIMEGoo
SLIME"Ghostbusters" goo
SLIMEFoul stuff
SLIMEIcky residue
SLIMEOoze
SLIMEIcky stuff
SLIMEGuck
SLIME"Ghostbusters" goop
SLIMESlug's trail
SLIMEGooey stuff
SLIMEIt's icky
SLIMELowlifes
SLIMELowlife
SLIMECatfish coating
SLIMEMuck or guck
SLIMEOozy stuff
SLIMEHorror-film prop
SLIME.. molds (fungi)
SLIMESticky mud
SLIMEThin mud
SLIMEGunky stuff
SLIMEUnpleasant residue
SLIMESlippery goo
SLIMEForm of mud
SLIMEDespicable sort
SLIMECover with ectoplasm
SLIMESnail trail
SLIMESlug secretion
SLIMEMire.
SLIMEMud.
SLIMEViscous mud.