trincest 

Sex between members of Trinity College at university of Toronto. One of the most unwritten rules at the institution.

The first years are committing too much trincest during frosh week, half of cosgrave hooked up with the other half.

trincest by Trinity College September 10, 2020

Trincest 

Triplets having sex.

Or any other 3 individuals from the same multiple birth, I'm not picky. It can be the same person twice for all I care.

I liked ElsaxAnna, I loved uptight Elsa/free Elsa, I adore the 3 together in trincest!

Trincest by MockTurtle October 10, 2016

Trincest 

Trincest is the act of dating someone within the same uni, if you go to a university that labels itself as "Trinity" such as Trinity College Dublin or Trinity Laban.

FAKE NAMES
Edward: Ayo bruh I heard that Ivo's been out there commiting trincest.
Dominick: Goddamnit I'm getting him kicked off this course

Trincest by Ivo'sSpecialFriend February 24, 2025

Twincest 

When someone is sexually intimate, or develops an incestuous relationship, with his or her own twin.

1. "The McPoyles from 'It's Always Sunny in Philadelphia' are definitely guilty of twincest."

2. Person A: "Dude, did you see those two guys going at it? They looked exactly alike!"
Person B: "Yeah, man, didn't you know? They're in a twincestuous relationship."

Twincest by NecroManzie September 28, 2009

twincest 

When twins are in lust/love with eachother.

twincest by Anonymous September 14, 2003

Twincest 

When Twins are in love with one another and/ or like to perform sexuall activities together.

Benji and Joel are in alot of Twincest fics.

Twincest by Rhiannon December 8, 2003

TWINCEST 

Twincest
Gives new meaning to fo fuck yourself.

TWINCEST example: Hikaru Hitachiin and Kaoru Hitachiin
(if you dont know who they are, LOOK THEM UP)

TWINCEST by ASIAN >.< Wu-Dawgg May 7, 2010