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

Derived forms: filthiest, filthier

See also: awful, dirty, filth, filthily, filthiness, nasty, soiled, unclean

Encyclopedia: Filthy Filthy, Rich and Catflap Filthy, Rich & Catflap

• fly in the face of
• fly in the ointment
• fly in the teeth of
• fly off the handle
• fly on
• fly on the wall
• fly open
• fly orchid
• fly poison
• fly rod
• fly sheet
• fly tent
• fly the coop
• fly tipper
• fly-by
• fly-by-night
• fly-fishing
• fly-half
• fly-tip
• flyaway
• flyblown
• flybridge
• flycatcher
• flycatching warbler
• flyer