Tripcest

Triplets that engage in incestrial actions.

triplets that have sex with eachother on a regular basis.

incest triplets tripcest sex

by D-generation-X June 21, 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

twincest

The fascination, lustful feelings or fetish with twins. Typically those featured in any adult themed entertainment.

"Did you see those hot twins online?"
Terry and Jerry are this week's featured twins in xxx.twincest.com.
The twincest I feel for those doublemint girls is beyond belief.

by mitcherrbahn September 8, 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

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