Top Definition
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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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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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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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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really, really good incest.
I was worried that it would be gross with my brother, but this incest is so fun, it's more like wincest!
by bloated teenager January 10, 2011

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That thing where you have sex with your sibling who is way out of your league
Netflix & Chill with my sister Cersei #Wincest
via giphy
by DutchCheeseHead May 12, 2016

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Combining the words win and incest
It's pretty much incest (love between siblings) but wincest is when it's a win sometimes relating to sex but not all the time usually it's when your ship or otp are sibling and the end up together and your just over her like "YESS MY OTP, MY SHIP THE SHIP HAS DOCKED SOOOO MUCH INCEST BUF ITS SUCH A WIN IYS WINCEST!!!!!!"
Yaayyyy my ship is together it's a win! Wait but the siblings... So it's incest? Wait! ITS WINCEST!!!!
by Shion-chan February 01, 2015

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