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The term "wincest" consists of both win and incest.
It's basically an act of hot sex between family members, which makes it WINcest.

Commonly used in /h/ within 4chan.
This topic requires more wincest...
by Alex Supreme January 27, 2008
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2
Derived from "win" and "incest".
As opposed to more common forms of incest where abuse is common, wincest must include both sibling and romantic love as well as mutually consensual sex.

As a result, wincest is almost exclusively between brother and sister, and not between parents and children. A related term, twincest, requires that the siblings be born as twins.
Not all incest is wincest, and not all wincest is twincest.

Wincest is win, but twincest is twice the win.

Cousincest can't be wincest because it's not incest.
by Anonymo_s December 06, 2010
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Brotherly love of a sexual nature between Dean & Sam Winchester of the tv show Supernatural.
"OMG, Wincest is soooo hawt!" squealed the fangirl.
by vixenontheedge June 08, 2006
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1. The romantic love between the brothers Sam and Dean Winchester from the show Supernatural, was previously a blanket term for any incestuous relationship in the Winchester family.

2. Combining the words "Win" and "Incest", a popular term in the anime/manga fandom for any sort of incest.

3. Sometimes just pertains to twincest, but lobbing off the t.
1. "That episode of Supernatural was chalked full of wincest goodness."

2. "Incest is Wincest"
by PippinPips May 31, 2010
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