Source : Webster's Revised Unabridged Dictionary (1913)

Choppy \Chop"py\, a. [Cf. {Chappy}.]
   1. Full of cracks. ``Choppy finger.'' --Shak.

   2. [Cf. {Chop} a change.] Rough, with short, tumultuous
      waves; as, a choppy sea.

Source : WordNet®

choppy
     adj : rough with small waves; "choppy seas"
     [also: {choppiest}, {choppier}]