Nasty /(nȧs"ty̆)/

Nas·ty

Nasty

a.
  1. Offensively filthy; very dirty, foul, or defiled; disgusting; nauseous.
  2. Hence, loosely: Offensive; disagreeable; unpropitious; wet; drizzling; as, a nasty rain, day, sky.
  3. Characterized by obscenity; indecent; indelicate; gross; filthy.
  4. Vicious; offensively ill-tempered; insultingly mean; spiteful; as, a nasty disposition.
  5. Difficult to deal with; troublesome; as, he fell of his bike and got a nasty bruise on his knee. [slang]