Twincest

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

twincest

A whole new way of 'go fuck yourself'.

When I saw those twins, all I thought of was twincest.

by HarunaXV October 12, 2010

twincest

incest between twins.
twins who have a sexual relationship

Benji madden + joel madden = yummy twincest

by squee February 19, 2005

twincest

sexual relations with your twin

lucy and anna were twins but they regularly ate eachother out. this is called twincest

by anonimus 1/\ December 1, 2007

twincest

Incest between twins. In the world of fanfiction, this is both a frequent and yummy occurance that we, as human beings, should be eternally grateful for. <3

Hizashi/Hiashi is mad twincest. <3

by Louey March 28, 2007

twincest fanfiction

A slash fanfiction involving twins in a romantic and/or sexual relationship. Many fans find this an abomination.

Some Noteworthy Categories of Twincest Fanfiction:
Fred and George from Harry Potter.

Rin and Yukio from Blue Exorcist.

by SilawenGreenleaf June 29, 2011

Twincest

The act of Incest between twins.

"I can't believe those twins are snogging! That is blatant twincest"

by Joey Masters January 2, 2008