English · Phrasal verb Attested

go back on

In real, traceable use. Part of the curated seed collection; community review is coming.

Sense 1

Both English Tiếng Việt

Meaning · English

To be treacherous or faithless to; to betray.

Nghĩa · Tiếng Việt

phản bội hoặc không trung thành với

Machine-translated — suggest a fix

Where it’s used: Used American English

to go back on friends

Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).

Both English Tiếng Việt

Meaning · English

To fail to keep; to renege on.

Nghĩa · Tiếng Việt

không giữ lời hứa; bỏ cuộc

Machine-translated — suggest a fix

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).

Both English Tiếng Việt

Meaning · English

Used other than figuratively or idiomatically: see go, back, go back, on.

Nghĩa · Tiếng Việt

Tham khảo go, back, go back, on

Machine-translated — suggest a fix

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).

What does “go back on” mean?

To be treacherous or faithless to; to betray.

Is “go back on” formal or informal?

No register label has been reviewed yet — treat it as neutral and check the usage notes above.