Source : Webster's Revised Unabridged Dictionary (1913)

Shammy \Sham"my\, n. [F. chamious a chamois, shammy leather. See
   {Chamois}.]
   1. (Zo["o]l.) The chamois.

   2. A soft, pliant leather, prepared originally from the skin
      of the chamois, but now made also from the skin of the
      sheep, goat, kid, deer, and calf. See {Shamoying}.
      [Written also {chamois}, {shamoy}, and {shamois}.]

Source : WordNet®

shammy
     n : a soft suede leather formerly from the sheep of the chamois
         antelope but now from sheepskin [syn: {chamois}, {chamois
         leather}, {chammy}, {chammy leather}, {shammy leather}]