Top Definition
when a man/woman are married and have sex with another man/woman.
I'm having an affair with the daugther of my friend.
by WEHG October 04, 2006

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The act of which a person in a committed relationship or marriage isnt faithful to their partner. It can be an emotional affair where attention and talk is the want or it can be a physical affair where fucking is the agenda and all that's wanted. It usually ends in a disaster, shame, guilt, divorce or the guilty parties running off together.
She and Russ had some fun back in their time. But he married Lane and then it was considered an affair to screw people on the side behind her back.
by heyithappens April 08, 2015

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something that destroys people's lives and something you should always refrain from having because you will realize eventually how stupid it was
He had an affair with her best friend, and when she found out about it, she instantly divorced him and they never talked again.
by pbfn4ever-51 May 22, 2011

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A word used by women of a certain age who are dried up sexually that means an event and not a sexual liaison.
"I'm having an affair."
"Oh, are you having it catered?"
by bagitbabe May 15, 2008

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The Urban Dictionary T-Shirt

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