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

When twins are in love with each other

Benji & Joel Madden (from good charlotte incase ya didnt know) - what a sight that would be...sadly the rumours arent true...are they...???!!?? ^_^ We'll just have to make do with the twincest fan fics!

by emo*ass February 16, 2004

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

A suitable subject for Harry Potter slash fiction about a certain pair of Weasley brothers.

Fred/George = TWINCEST!!!

by Alianne September 14, 2003

twincest

twins having sex.. its so wrong, yet it feels so right

me and my twin have twincest. i fuck my twin, and enjoy it.

by nadia_aidian February 28, 2004

twincest

When twins go at it in the sack and it is hotter than anything else.Taboo twins carries hotstories about twins original and fan fiction.

The hot twincest stories found here tabootwins.com

by taboo twins June 1, 2010

Twincest

Twins preforming incest

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

by death by a spoon January 26, 2010