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

Moby Thesaurus II by Grady Ward, 1.0:

79 Moby Thesaurus words for "scamp":
   bad boy, begrudge, bird, blackguard, blink, booger, buffoon,
   bugger, carefully ignore, chap, cold-shoulder, cut a corner,
   cut corners, cutup, devil, dodge, dog, duck, elf, enfant terrible,
   famish, fudge, funmaker, grudge, hood, hoodlum, hooligan, imp,
   joker, jokester, knave, limb, little devil, little monkey,
   little rascal, live upon nothing, minx, mischief, mischief-maker,
   pass over, pass over lightly, pinch, pinch pennies, pixie,
   practical joker, prankster, precious rascal, puck, rapscallion,
   rascal, ribald, rogue, rowdy, ruffian, scalawag, scant, scapegrace,
   scoundrel, screw, scrimp, shyster, skim, skim over,
   skim the surface, skimp, skip over, slight, slubber over, slur,
   slur over, slyboots, sneak, spalpeen, starve, stint, touch upon,
   touch upon lightly, villain, wag