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Outcest is when you have a sexual relationship with someone who's not related to you. Opposite of incest
Outcest is illegal in Alabama
outcest by Emcee April 12, 2005
adj. disinterested in an approaching person as shown by words and behaviors

pronounced like "interested," only replacing "in" with "out"
That b*tch wasn't interested, she was OUTrested! Between her body language and curt answers, she clearly indicated I couldn't fall back and leave her alone any faster. Oh well, other fish.
outrested by Kuahmel December 7, 2009
(n.) sexual intercourse between non-related persons.
Billy and Roberta had outcest because they were not related.
outcest by Ichabob. August 25, 2008

outcesticide 

a series of five bootlegged nirvana CDs, one of the most famous bootleg series, usually five but there are imposters that have 7 cds in it.
i bought outcesticide off ebay HOLAY CRAP
outcesticide by NaotaXL August 2, 2004
to do better than someone, specifically for the purpose of self gratification, but ultimately for others to acknowledge publicly.
He knew he had to outbest Timothy, especially since everybody gave him such high praise for everything he did.
outbest by edco_1 June 28, 2018
Outcest is shorthand for outcestosexuality (which is sexual behaviour and attraction towards people of a different lineage)

The other one is incest, shorthand for incestosexuality (sexual behaviour and attraction towards people of the same lineage).

While current studies only say 98% of the population is outcestosexual, some sociologists believe it could be due to societal repression. Truer estimates in the future could be as low as 58% outcestosexual as society becomes more tolerant with kids exploring their sexuality with siblings, as well as visiting incest bars to explore their sexuality with incestuous adults who roleplay as parental figures (since parenthood is a social construct).

Unfortunately, incestophobic tropes represent incestuous people as groomers, a bigoted slur.

Rights organizations hope to legalize same lineage marriage and adoption rights for incestuous couples who seek to pleasure their sibling-spouse and adopted kids.
I'm part of the school incest outcest alliance club.
Outcest by Quentesial November 8, 2023