filth

(noun) any substance considered disgustingly foul or unpleasant. Synonyms: crud, skank.

(noun) the state of being covered with unclean things. Synonyms: dirt, grime, soil, stain, grease, grunge.

(noun) a state characterized by foul or disgusting dirt and refuse. Synonyms: filthiness, foulness, nastiness.

(noun) an offensive or indecent word or phrase. Synonyms: obscenity, smut, vulgarism, dirty word.