Main entry: foul, filthy, nasty
Definition: disgustingly dirty; filled or smeared with offensive matter
Usage: as filthy as a pigsty; a foul pond; a nasty pigsty of a room
Main entry: cruddy, nasty, smutty, foul, filthy
Definition: characterized by obscenity
Usage: had a filthy mouth; foul language; smutty jokes
Main entry: lousy, filthy, dirty
Definition: vile; despicable
Usage: a dirty (or lousy) trick; a filthy traitor