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

twincest

Slash (mainly) between twins.

1. Elladan and Elrohir, twin sons of Elrond of Imladris. From lotr
2. Weasley twins from HP

by brat July 3, 2004

Twincest

Strong emotional and physical attraction between twins.

Did you see Tammy and Sammy together last night? Total twincest!

by powergannon July 23, 2010

twincest

The act of twins engaging in incest.

Twins having intercourse.

"I heard John and Eli got busy last night."
"Dude, they're twins!"
"Yeah, twincest."

by areyoureallyreadingthis? April 19, 2010

twincest

3rd person masturbation

Twins might justify twincest with each other by thinking of it as 'nothing different than masturbating from the 3rd person point of view'

Twincest between guys may often be referred to as a '3rd Person Shooter'

Mutual '3rd Person' Masturbation

by Jack U. Hoff April 28, 2008