1. (

• filthy ,
• foul ,
• nasty

) disgustingly dirty; filled or smeared with offensive matter; "as filthy as a pigsty"; "a foul pond"; "a nasty pigsty of a room" ;

2. (

• dirty ,
• filthy ,
• lousy

) vile; despicable; "a dirty (or lousy) trick"; "a filthy traitor" ;

3. (

• cruddy ,
• filthy ,
• foul ,
• nasty ,
• smutty

) characterized by obscenity; "had a filthy mouth"; "foul language"; "smutty jokes" ;