Source : Webster's Revised Unabridged Dictionary (1913)

Cheater \Cheat"er\, n.
   1. One who cheats.

   2. An escheator. [R.] --Shak.

Source : WordNet®

cheater
     n : someone who leads you to believe something that is not true
         [syn: {deceiver}, {cheat}, {trickster}, {beguiler}, {slicker}]