He's 'filthy rich'. [=he's extremely rich; he has so much money that his wealth is disgusting or offensive]
He has a 'filthy' mouth. [=he uses language that is very offensive]
He has a 'filthy' temper. [=he gets angry very easily]
(..) who fixed it for me. Nobody sent me. I do business for myself. So this is something... personal, is it? What filthy piece of shit... did I do now? You killed my brother. I'm sorry. And you wanna join him? It's always the same thing. (..)1994 Léon: The Professional