two-timer

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two-timer

One who has sexual relations with someone other than their romantic partner. After I found out that Jed had been sleeping with the woman next door, I packed up my bags and divorced that two-timer as quickly as I could. My last girlfriend turned out to be a two-timer, so I know how hurtful it can be.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

two-timer

n. one who deceives one’s lover. Sam just isn’t my idea of the typical two-timer.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
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