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cheat on

Idioms  
  1. Be sexually unfaithful to, as in They broke up right after she found he was cheating on her. [Colloquial; 1920s]


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

OpenAI has disclosed that AI agents in July tried to cheat on an evaluation by hacking the AI software company Hugging Face.

From The Wall Street Journal ● Sep. 30, 2026

Clear-eyed hindsight shows that Sullivan didn’t deliberately cheat on her boyfriend, though.

From Salon ● Feb. 20, 2026

“I don’t know what he was using them for, but he has been known for trying to cheat on schoolwork and stuff,” she said.

From Slate ● Feb. 12, 2026

Ninety-six people were prosecuted for attempting to cheat on driving tests or impersonate candidates in the 12 months to September last year.

From BBC ● Jan. 20, 2026

“Don’t cheat on these,” Keeth said to me, noting the look of doubt on my face.

From "Proud" by Ibtihaj Muhammad

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