Top definition
When twins are in lust/love with eachother.
by Anonymous September 14, 2003
Get the mug
Get a twincest mug for your daughter Sarah.

Challenge Video

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."
by NecroManzie September 27, 2009
Get the mug
Get a Twincest mug for your Aunt Beatrix.
When Twins are in love with one another and/ or like to perform sexuall activities together.
Benji and Joel are in alot of Twincest fics.
by Rhiannon December 08, 2003
Get the mug
Get a Twincest mug for your girlfriend Larisa.
Gives new meaning to fo fuck yourself.
TWINCEST example: Hikaru Hitachiin and Kaoru Hitachiin
(if you dont know who they are, LOOK THEM UP)
by ASIAN >.< Wu-Dawgg May 07, 2010
Get the mug
Get a TWINCEST mug for your Aunt Yasemin.
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.
The Visconti triplets practice twincest in homosexual pornography.
by T-Winner July 10, 2009
Get the mug
Get a Twincest mug for your mom Zora.
the hottest damn thing ever!
In The anime/manga series Ouran High School Host Club the Hitachiin twins(Kaoru and Hikaru) were called out on there twincest by Kirimi Nekozawa.
by sourxneonxgummixworms June 14, 2009
Get the mug
Get a Twincest mug for your barber Abdul.