- filth, crud, skank - any substance considered disgustingly foul or unpleasant
--1 is a kind of waste, waste material, waste matter, waste product
- dirt, filth, grime, soil, stain, grease, grunge - the state of being covered with unclean things
--2 is a kind of dirtiness, uncleanness
- filth, filthiness, foulness, nastiness - a state characterized by foul or disgusting dirt and refuse
--3 is a kind of unsanitariness