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

When twin brother and sister have sex with each other. Something fans of Rosiel/Alexiel pairings from Angel Sanctuary write about in fanfics.

We're twin brother and sister who engage in twincest together.

by Michael & Michele September 23, 2005

Twincest

Twins in which engage in sexual intercourse, or fullfill each others sexual desires.

Some famous examples are:
The olsen twins are twincest
the Harvey Brothers practise twincest

by Dylaoptupus February 5, 2010

Twincest

Twins preforming incest

Jerry and Jessica loved each other so much, they preformed twincest

by death by a spoon January 26, 2010

Twincest

Incest between twins

“I enjoy twincest porn.”
“My little brother and sister engage in twincest and I like to watch through the keyhole while I bop the ole’ chode.”
“Jaimie and Cersei Lanister on Game of Thrones have a twincestuous relationship.”
“Twincest is wincest.”

by Resicoi July 6, 2019

Twincest

Incest between twins, also known as "twincest", is a subclass of sibling incest and includes both heterosexual and homosexual relationships. While in modern Western European culture, such behaviour is considered taboo and is quite rare, incest between twins is a common feature in Indo-European, Indonesian and Oceanian mythology, and there are a few societies in which the prohibition on it is limited or it is partially accepted.

twins having hot make out season what can be more than just kissing. Thats called Twincest.

by ChocoMonster August 26, 2012

Twincest

having sexual relations with your twin (fraternal or identical...)

Twincest is on the rise.

Ew.

by letthegoodtimesroll June 16, 2010