Nouns

(n)filth, crud, skankany substance considered disgustingly foul or unpleasant
(n)dirt, filth, grime, soil, stain, grease, grungeanything regarded as making something unclean
(n)filth, filthiness, foulness, nastinessa state characterized by foul or disgusting dirt and refuse
(n)obscenity, smut, vulgarism, filth, dirty wordan offensive or indecent word or phrase