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]
(..) Not really. You didn't wash your hands before you sat down to dinner, did you? Let me see. Dad. These hands are filthy. Look. There's dirt way under this fingernail. - Leland, what are you doing? - Look at this finger, here. (..)1992 Twin Peaks: Fire Walk with Me