double cross

Verb

double-cross (third-person singular simple present double-crosses, present participle double-crossing, simple past and past participle double-crossed)

1. (transitive) To betray or go back on; to deceive someone after having gained their trust and led them to believe that they were being aided.
   • If you double-cross us, we'll track you down and kill you.

   Synonyms:

   quisle, sell out, stab in the back, assfuck, betray, burn, cop out, cross out, cross up, do someone dirty

2. (transitive) Of breeding, to cross twice in hybridization, as (A × B) × (C × D); for example, in commercial hybrid seed corn, A through D are classically inbreds, and their grandoffspring is the seed for sale.

See all 4 meanings of double-cross