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]
(..) ...into Fangorn Forest. Fangorn? What madness drove them in there? Did we lose him? I think we lost him. I'm going to rip out your filthy little innards! Come here! Trees. Climb a tree. He's gone. Merry! Let's put a maggot hole in your belly! (..)2002 The Lord of the Rings: The Two Towers
(..) - Can you smell it? - Yes. I can smell it. We're not alone. The thieves. The thieves. The filthy little thieves. Where is it? Where is it? They stole it from us. My precious. Curse them, we hates them! (..)2002 The Lord of the Rings: The Two Towers