go back on

Related to go back on: renege, go back on a promise

go back on (something)

To not do something one said one would do; to renege on something. People are beginning to worry that the president is going to go back on his campaign promises. You made a commitment to support our project, and now you've gone back on your word!
See also: back, go, on
Farlex Dictionary of Idioms.

go back on

Fail to honor or keep, as in You can't go back on your word, or One should never go back on a promise. [Mid-1800s]
See also: back, go, on
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • (one) could use (something)
  • (one) never would have guessed
  • (one) doesn't give a rip (about something)
  • (one) doesn't give a hoot (about something)
  • (one) won't hear of (something)
  • (one's) heart is set on (something)
  • (one) could stand (something)
  • (I) wouldn't (do something) if I were you
  • all right
  • a/the feel of (something)