go back on something phrasal verb (see also go)
to not do something that you promised or agreed to do
go back on your word/promise/decision
Delors claimed that the President had gone back on his word.

[TahlilGaran] Dictionary of Contemporary English ▲

go back on
to not be faithful or loyal to one's word or an agreement
The company directors went back on their word to give the employees a salary increase.

[TahlilGaran] English Idioms Dictionary ▲

go back on something
to not be faithful or loyal to one's word or an agreement
The company directors went back on their word to give the employees a salary increase.

[TahlilGaran] English Idioms Dictionary ▲

go back on
v. phr.
1. To turn against; not be faithful or loyal to.
Many of the man's friends went back on him when he was sent to prison.
The boy's father told him not to go back on his promise.
Compare: BACK DOWN, TURN ONE'S BACK.
2. To fail to do necessary work; not work.
Grandfather's eyes are going back on him.
Compare: BREAK DOWN⁴, GIVE OUT.

[TahlilGaran] English Idioms Dictionary ▲