homewrecker

or home-wreck·er

[ hohm-rek-er ]

noun

1. a person who disrupts or destroys the harmony of a marriage or long-term relationship by having an affair with one of the partners:

   She was dumped by her longtime hubby Rod, who then shacked up with that homewrecker Cassie Jones.

Word History and Origins

Origin of homewrecker¹

First recorded in 1875–80; home ( def ) + wrecker ( def )