philanderer

[fi-lan-der-er]

noun

1. a person, usually a man, who has many casual sexual encounters or affairs, especially when married or in a committed relationship.

   After three of his infidelities, she’d finally had enough of a husband who by all accounts had become a serial philanderer.

Word History and Origins

Origin of philanderer¹

philander ( def. ) + -er ¹ ( def. )