double-crosser

dou·ble-cross (dbl-krôs, -krs)

tr.v. dou·ble-crossed, dou·ble-cross·ing, dou·ble-cross·es

To betray by acting in contradiction to a prior agreement. See Synonyms at deceive.

n.

1. often double cross An act of betraying an ally, a friend, or an associate.

2. double cross Genetics A cross in which each parent is the product of a single cross. It can be represented as AB × CD, where A, B, C, and D are inbred lines.

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double-crosser n.

Thesaurus

Noun

1.

double-crosser - a person who says one thing and does another double-dealer, traitor, two-timer, betrayer beguiler, cheater, deceiver, trickster, slicker, cheat - someone who leads you to believe something that is not true Judas - someone who betrays under the guise of friendship