filth·y 
(fĭlthē)
(fĭlthē)adj. filth·i·er, filth·i·est
1. Covered or smeared with filth; disgustingly dirty. See Synonyms at dirty.
2. Obscene or offensive: a filthy magazine; filthy language.
3. Vile; nasty: a filthy traitor.
filthi·ly adv.
filthi·ness n.