Top Definition
Outcest is when you have a sexual relationship with someone who's not related to you. Opposite of incest
Outcest is illegal in Alabama
by Emcee April 12, 2005
2 more definitions
(n.) sexual intercourse between non-related persons.
Billy and Roberta had outcest because they were not related.
by Ichabob. July 29, 2008
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

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×