Top definition
Outcest is when you have a sexual relationship with someone who's not related to you. Opposite of incest
by Emcee April 12, 2005
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2
(n.) sexual intercourse between non-related persons.
Billy and Roberta had outcest because they were not related.
by Ichabob. July 29, 2008
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3
To have sex with people outside of your family
"He likes outcest but not incest"
by X_SavageMemes_X November 14, 2016
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The vengeful act of crapping on a lover's chest while they sleep.

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4
Sexual relations with a step-sibling.
In the movie Clueless, Paul Rudd and Alicia Silverstone's characters only kissed but eventually you know they would've committed outcest.
by 3gmaxud August 24, 2014
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