double-cross(redirected from double-crosser)
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tr.v. double-crossed, double-crossing, double-crosses
To betray by acting in contradiction to a prior agreement.
1. often double cross An act of betraying an ally, friend, or 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.