Definition of Filthy

Adjective: filthy (filthier,filthiest) fil-thee

Disgustingly dirty; filled or smeared with offensive matter
"as filthy as a pigsty";
- foul, nasty, cruddy
Vile; despicable
"a filthy trick";
- dirty, lousy, cruddy
Characterized by obscenity
"had a filthy mouth";
- foul, nasty, smutty