unclean metal (e.g. dust, mud), especially when it is where it is not wanted (e.g. on the skin, clothes, in buildings)

grime, impurity

a dirty mass; obscene language, pictures etc

dirt, pollution

(an instance of) being obscene, bad language etc

indecency, immorality; vulgarism

vulgar behaviour, language or taste; vulgar acts, words etc

coarseness