Adjective
-
characterized by obscenity
"had a filthy mouth"
"foul language"
"smutty jokes"
-
vile
despicable
"a dirty (or lousy) trick"
"a filthy traitor"
-
disgustingly dirty
filled or smeared with offensive matter
"as filthy as a pigsty"
"a foul pond"
"a nasty pigsty of a room"