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!!"
Person 2: "TWINNING!"
Person 1: "Uh, we're wearing the same sweater?"
Person 2: "TWINNING!!"
by .,.,.,.,.,. January 06, 2012

To unknowingly be drugged by your friend. Typically mdma is dropped in your beverage while you are distracted or in the restroom.
by Jsho March 13, 2016

by Lil Korean kiddy March 31, 2015

by itswhatervrs November 03, 2013

by joker75 May 23, 2006

Oh my god! Did you see that? They are both twinning the same prom dress!
DAMNIT!
Whats wrong billy?
NOW I CANT TELL WHICH ONE IS MORE HOT
Uh... You're 68
UH YEAH, BUT I STILL GOT SOME MILK LEFT IN ME
What the actual fuck-
DAMNIT!
Whats wrong billy?
NOW I CANT TELL WHICH ONE IS MORE HOT
Uh... You're 68
UH YEAH, BUT I STILL GOT SOME MILK LEFT IN ME
What the actual fuck-
by CheesyFriesWithExtraCheese October 20, 2019

The act of transforming one person into a clone of another person, examples often exist within the TG/TF fetish side of the internet.
"Have you ever seen the second and third Matrix movies? Agent Smith just goes mad and starts twinning everyone."
by Raatilam May 10, 2018
