double cross: Meaning and Definition of

dou'ble cross'

1. a betrayal or swindle of a colleague.
2. an attempt to win a contest that one has agreed beforehand to lose. Cf. cross (def. 21).
3. a cross in which both parents are first-generation hybrids from single crosses, thus involving four inbred lines.

dou•ble-cross

1. to prove treacherous to; betray or swindle, as by a double cross.