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Twinning is performed by having intercourse with two twins. Your Winning with Twins, Twinning.
Guy1: "Yo, what are you doin' tonight?"
Guy2: "Twinning."
Guy1: "amazing"
by Jwatter August 18, 2011
Act of having intercourse or sexual relations with a set of twins.
Excuse me, Im Twinning
by hrod_55 July 19, 2011
Doubling your sexual pleasure by getting it in with lesbian twins.
Dude 1: I got hot DTF twins comin over tonight.
Dude 2: Bro, you are so twinning!
Dude 1: Duh... Twinning!
by StattnMacy August 18, 2011
A take on the popular term "winning," it refers to identical thoughts or behavior, as well as to brilliance.
Person 1: "Oh my gosh, I was just about to say that!"
Person 2: "TWINNING!"

Person 1: "Uh, we're wearing the same sweater?"
Person 2: "TWINNING!!"
by .,.,.,.,.,. January 06, 2012
When two females begin to sync their shaving patterns.

A.K.A. Their armpits and/or other bodily parts.
Lindz: Hey Britt, how are your pits today?
Britt: Great, I just shaved them last night!
Lindz: OMG, me too!
Britt: We are so twinning!
Linz: Ya we are!!!
by vagattack March 27, 2014
The act of Winning and being a Twin.. simultaneously.

Being Able to do anything you want exceptionally well with you're twin.

All Arguments Against TWINNERS Are Invalid
Yo man, look at will and garby dude they're always Twinning.

DUH #Twinning
by lyrically genius June 03, 2012
you are the same as someome. created by the sasskateers.
omg she is sooooo twinning with me!
by goddd June 27, 2014