Source : Webster's Revised Unabridged Dictionary (1913)

Nicker \Nick"er\, n. [From {Nick}, v. t.]
   1. One of the night brawlers of London formerly noted for
      breaking windows with half-pence. [Cant] --Arbuthnot.

   2. The cutting lip which projects downward at the edge of a
      boring bit and cuts a circular groove in the wood to limit
      the size of the hole that is bored.

Source : WordNet®

nicker
     n : the characteristic sounds made by a horse [syn: {neigh}, {whicker},
          {whinny}]

nicker
     v : characteristic of horses [syn: {neigh}, {whicker}, {whinny}]