# cheat on

idiom

Source: https://englishreference.com/idiom/cheat-on
Updated: 2026-08-10

## Meaning

To be unfaithful to, especially in a romantic relationship.

## Examples

- He would never cheat on his partner.
- She felt heartbroken when she discovered that her boyfriend had been cheating on her for months.
- Despite their public image of marital bliss, rumors eventually surfaced that he had been cheating on his wife throughout their long marriage.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.