Definitions of filthy:
- adjective: disgustingly dirty; filled or smeared with offensive matter
Example: "As filthy as a pigsty"
- adjective: characterized by obscenity
Example: "Had a filthy mouth"
- adjective: thoroughly unpleasant
Example: "Filthy (or foul or nasty or vile) weather we're having"
- adjective: vile; despicable
Example: "A filthy traitor"