cheat on

phrasal verb

cheated on; cheating on; cheats on

informal

: to break a promise made to (someone, such as one's wife or husband) by having sex with someone else

He cheated on his wife/girlfriend.

Examples of cheat on in a Sentence

Recent Examples on the Web

Previous reader questions have been about worries for a daughter dating someone much older, finding hope after being cheated on and whether a boyfriend’s disdain for dogs is a dealbreaker. —Haben Kelati, Washington Post, 18 Apr. 2024

The percentage of high school students who cheated on assignments actually dipped in 2023 as ChatGPT began taking off, researchers found. —Laura Bratton, Quartz, 12 Apr. 2024

This hot mess began after her mother, Kris Jenner, admitted in her 2011 memoir to cheating on her husband, late lawyer Robert Kardashian, without naming names. —Madeleine Marr, Miami Herald, 12 Apr. 2024

During his lengthy absence, Abramović later found out that Ulay was cheating on her with a beautiful young gallery assistant. —Michael I. Norton, TIME, 11 Apr. 2024

Why? Go inside the long-running, sophisticated and surprisingly widespread scheme to cheat on smog tests the feds just cracked down on. —Ryan Fonseca, Los Angeles Times, 5 Apr. 2024

For those who need a refresher: In Season 1, Molly discovers her tech billionaire husband John Novak (Adam Scott) cheated on her. —Alli Rosenbloom, CNN, 3 Apr. 2024

Taylor cheated on Schroeder multiple times, including with her best friend Kristen Doute. —Erin Clements, Peoplemag, 2 Apr. 2024

Beyoncé’s 2016 album, Lemonade, insinuated that her husband, Jay-Z, had cheated on her. —Spencer Kornhaber, The Atlantic, 29 Mar. 2024