The Collaborative International Dictionary of English v.0.48:

Nipper \Nip"per\, n.
   1. One who, or that which, nips.
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   2. A fore tooth of a horse. The nippers are four in number.
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   3. A satirist. [Obs.] --Ascham.
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   4. A pickpocket; a young or petty thief. [Old Cant]
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   5. (Zool.)
      (a) The cunner.
      (b) A European crab (Polybius Henslowii).
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