The Collaborative International Dictionary of English v.0.48:

Curvet \Cur"vet\, v. i. [imp. & p. p. Curveted or -vetted;
   p. pr. & vb. n. Curveting or -vetting.] [Cf. It.
   corvettare. See Curvet, n.]
   1. To make a curvet; to leap; to bound. "Oft and high he did
      curvet." --Drayton.
      [1913 Webster]

   2. To leap and frisk; to frolic. --Shak.
      [1913 Webster]