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Adjective: filthy (filthier,filthiest)  fil-thee
  1. Disgustingly dirty; filled or smeared with offensive matter
    "as filthy as a pigsty";
    - foul, nasty, cruddy [informal]
  2. Vile; despicable
    "a filthy trick";
    - dirty, lousy [informal], cruddy [informal]
  3. Characterized by obscenity
    "had a filthy mouth";
    - foul, nasty, smutty

Derived forms: filthiest, filthier

See also: awful, dirty, nasty, soiled, unclean

Encyclopedia: Filthy, Rich & Catflap