When someone is sexually intimate, or develops an incestuous relationship, with his or her own twin.
1. "The McPoyles from 'It's Always Sunny in Philadelphia' are definitely guilty of twincest."
2. Person A: "Dude, did you see those two guys going at it? They looked exactly alike!"
Person B: "Yeah, man, didn't you know? They're in a twincestuous relationship."
2. Person A: "Dude, did you see those two guys going at it? They looked exactly alike!"
Person B: "Yeah, man, didn't you know? They're in a twincestuous relationship."
by NecroManzie September 27, 2009
Challenge Video
Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.
by rednos January 10, 2013
by Rhiannon December 08, 2003
TWINCEST example: Hikaru Hitachiin and Kaoru Hitachiin
(if you dont know who they are, LOOK THEM UP)
(if you dont know who they are, LOOK THEM UP)
by ASIAN >.< Wu-Dawgg May 07, 2010
Incest between any set of multiple birth siblings. Twincest can occur between twins, triplets, octuplets, etc. Twincest may also occur across gender lines (sisters, brothers, or both). Twincest can be any level of sexual intimacy.
by T-Winner July 10, 2009
βI enjoy twincest porn.β
βMy little brother and sister engage in twincest and I like to watch through the keyhole while I bop the oleβ chode.β
βJaimie and Cersei Lanister on Game of Thrones have a twincestuous relationship.β
βTwincest is wincest.β
βMy little brother and sister engage in twincest and I like to watch through the keyhole while I bop the oleβ chode.β
βJaimie and Cersei Lanister on Game of Thrones have a twincestuous relationship.β
βTwincest is wincest.β
via giphy
by Resicoi July 06, 2019
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