double-crosser

from WordNet (r) 3.0 (2006)

double-crosser
    n 1: a person who says one thing and does another [syn: {double-
         crosser}, {double-dealer}, {two-timer}, {betrayer},
         {traitor}]

from The Collaborative International Dictionary of English v.0.48

double-crosser \double-crosser\ n.
   one who double-crosses another; a person who says one thing
   and does another.

   Syn: double-dealer, betrayer, traitor.
        [WordNet 1.5]

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