(1):

(n.) A fore tooth of a horse. The nippers are four in number.

(2):

(n.) A pickpocket; a young or petty thief.

(3):

(n.) A satirist.

(4):

(n.) One who, or that which, nips.

(5):

(n.) A European crab (Polybius Henslowii).

(6):

(n.) The cunner.