go back on (one's) promise

(redirected from go back on somebody's promise)

go back on (one's) promise

To not do something one said one would do; to renege on something. People are beginning to worry that the governor is going to go back on his promise and not lower taxes for lower-income families after all. You made a commitment to support our project, and now you've gone back on your promise!
See also: back, go, on, promise
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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