go back on

Verb

go back on (third-person singular simple present goes back on, present participle going back on, simple past went back on, past participle gone back on)

1. To be treacherous or faithless to; to betray.
   • to go back on friends

   Synonyms:

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

2. To fail to keep; to renege on.
   • to go back on one's promises
   • BBC News
     On Sunday Iranian President Mahmoud Ahmadinejad said his country would not go back on its nuclear programme.
3. Used other than figuratively or idiomatically: see go, back, go back, on.
   • He went back on the same path.
   • They said the electricity will go back on before midnight.