The Collaborative International Dictionary of English v.0.48:

Scamp \Scamp\, v. t. [Cf. Scamp,n., or Scant, a., and
   Skimp.]
   To perform in a hasty, neglectful, or imperfect manner; to do
   superficially. [Colloq.]
   [1913 Webster]

         A workman is said to scamp his work when he does it in
         a superficial, dishonest manner.         --Wedgwood.
   [1913 Webster]

         Much of the scamping and dawdling complained of is that
         of men in establishments of good repute. --T. Hughes.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Scamp \Scamp\ (sk[a^]mp), n. [OF. escamper to run away, to make
   one's escape. Originally, one who runs away, a fugitive, a
   vagabond. See Scamper.]
   A rascal; a swindler; a rogue. --De Quincey.
   [1913 Webster]

WordNet (r) 3.0 (2006):

scamp
    n 1: one who is playfully mischievous [syn: imp, scamp,
         monkey, rascal, rapscallion, scalawag, scallywag]
    v 1: perform hastily and carelessly