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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.

Solution manuals have long been online, and any number of web sites have enabled students to cheat on assigned homework.

From The Wall Street Journal • May 25, 2026

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

From Salon • Feb. 20, 2026

People now use AI to cheat on homework, generate low-quality social-media videos or get responses like “that’s exactly right!” to everything they input.

From MarketWatch • Oct. 11, 2025

An English teacher who helped his pupils to cheat on their coursework has been banned from the classroom indefinitely.

From BBC • Sep. 26, 2024

“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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