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

The act of Incest between twins.

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

by Joey Masters January 2, 2008

Twincest

A form of incest between twins. Twins having sexual relations.

There is often fanfic involving twins such as Fred and George Weasley having sex.

"I just read this really odd fanfiction that involved a lot of twincest!"

by epsilina August 4, 2007

Twincest

Stuff you say "woah, that's sexy" to.

Woah, that twincest is sexy.

by Kat-chan February 1, 2008

twincest

Twins having sexual relations. Capeesh?

Tom and Bill Kaulitz (Tokio Hotel) have twincest time on the tour bus every night.

by anonymous twc fan February 28, 2009