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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.

Though her professors warned against using it to cheat on assignments, she wasn’t tempted.

From The Wall Street Journal • May 26, 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

He didn’t cheat on his girlfriend like Nick, or spread computer viruses just for fun like Aurora.

From "Schooled" by Gordon Korman

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