dou·ble–cross 
/ˌdʌbəlˈkrɑ:s/ verb
dou·ble–cross·es; dou·ble–crossed; dou·ble–cross·ing /ˌdʌbəlˈkrɑ:s/ verb [+ obj] : to cheat or deceive (someone) especially by doing something that is different from what you said you would do
▪ I thought I could trust her, but she double-crossed me.
▪ I thought I could trust her, but she double-crossed me.
— double cross noun, plural ∼ crosses [count]
▪ He accused his manager of a dirty double cross. ▪ lies and double crosses
▪ He accused his manager of a dirty double cross. ▪ lies and double crosses
— dou·ble–cross·er noun, plural dou·ble–cross·ers [count]
▪ They're a couple of dirty double-crossers.
▪ They're a couple of dirty double-crossers.
