12 year old 

someone who constantly uses internet abbreviations in daily conversation

12 year old: "SMH ROFL LAFBO."
Normal person: "She's such a 12 year old."

12 year old by qwertyujkl December 15, 2010

12 Year Old 

An age where kids don't want to be kids, even though pricing at movie theaters and most restaurants says that still are, and their mentality is child-like.

"I wanna seeeejqp Innn da Miggz, one TWELVE." Wiggadawgshit sticks out his chest, showing he is NOT a child. "One twelve" is the way for a 12 year old to order a child's ticket...

12 Year Old by Downvoting Victim December 28, 2005

12 year old 

A masturbation MASTER, masturbates almost every night also girls finger themselves

Teacher:Stop spewing ur cum on Rachael!!!
Boy(12 year old):Sorry Teach .....you want some???
Teacher:SURE right in my mouth plz
Boy(12 year old):*cums in her mouth*
Rachael(12 year old):*cries* I wanted that!!!

12 year old by Riku_Fucker(Sora) December 14, 2008

12 year old 

A person that isn't 13 yet. Even though they might be better than you at some things, they're 12 and not 13 so you can make fun of them. They're 12 and not a teen and you can have fun with that anytime you want.

12 year old: Hey, wanna watch a movie?
Teen: Dude, it's PG-13...
12 year old: But-
Teen: 12 YEAR OLD, HAHA!

12 year old by Da Interwebz January 29, 2015

12 year old 

Someone who says things like "L" "Ratio" "you fell off" and thinks people take them as a human being... they're not .. kill them all

12 year old: Ratio+L

Me: kill yourself stupid 12 year old you aint a human

12 year old by BrotImWeltraum April 15, 2022

12 year old 

kids that think they are good at video games but they suck and talk a lot of shit

Dude you are a 12 year old

12 year old by The Taz February 1, 2019

12 year old 

12 year olds these days are playing fortnite while hitting their juul and cussing at their mom they are hated by most teens and are so ready to be a teen they are probably more mature than you think they are

12 year old-fuck bro hand me my mother fucking juul this bitch just called me 12 like i’m gonna be 13 next month

12 year old by 69$$$$$$ October 19, 2018