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

Timberlake's Cheating Rumors with Olivia Munn In 2010, it was reported that Timberlake had allegedly cheated on then-girlfriend Biel with actress Olivia Munn around the time that the pair had broken up. —Ilana Kaplan, Peoplemag, 22 June 2024

At least four major Japanese automakers, including Toyota, have admitted to cheating on safety tests over the last several years, if not decades. —William Gavin, Quartz, 17 June 2024

Listen to this article A 2022 NYPD promotion exam for future sergeants was riddled with problems that contributed to cheating on the test, a new oversight report concludes. —Graham Rayman, New York Daily News, 3 June 2024

Over the weekend, Boone County voters received a mailer claiming Massey had a profile on Ashley Madison, a site for people who want to cheat on their spouses. —Jolene Almendarez, The Enquirer, 22 May 2024