A person like Jai Coxon who thinks they are older than nine but in reality are still an egg.
Ryan: Hey Jai, you're a twelvie.
Jai: No I'm thirteen.
Ryan: Fuck off cunt
Get the Twelvie mug.
A kid about 12-15 who thinks they are top shit, is a hoe. Dresses like a slut. And are bitches. And brags about the many boyfriends they have had. And they normally deny being a twelvie. They wear shit tons of makeup and are rude to people who say something bad about their beloved Jacob shitourious the are probably also addicted to musical.y Who is obsessed with Jacob sartourious and Danielle Cohn and slime. Ok I am done ranting lol
A kid about 12-15 who thinks they are top shit, is a hoe. Dresses like a slut. And are bitches. And brags about the many boyfriends they have had. And they normally deny being a twelvie. They wear shit tons of makeup and are rude to people who say something bad about their beloved Jacob shitourious the are probably also addicted to musical.y Who is obsessed with Jacob sartourious and Danielle Cohn and slime. Ok I am done ranting lol
by Mysterious girl 01 April 11, 2018
Get the Twelvie mug.
A person aged 10-12 who swears, references memes brags about having social media, and overall tries to act older than they are. A twelvie will try to make plans without consulting their parents, beg to have social media or a phone, and says hashtagout loud non ironically. A key sign of identifying a twelve is if they have musically/tik tok, HOWEVER, if they don’t post and are just using it to look at other peoples, than this is a legitimate excuse. Twelves will often listen to songs with a lot of swearing, (rap music), as they think they are so old and cool that they are allowed to. Twelvies will always do their best to hang out and relate to the older teens at family gatherings, ignoring the smaller ones because they are so much older and cooler and they are with the teen sqaud. They use the app Snapchat a lot and post dumb shit to their stories. Twelvies will get triggered to the max if they are told that they are too young to be apart of something, hear something, watch something, listen to something, or have something. But the more accurate way of recognising a twelvie is if they get TRIGGERED when people call them out for being one.
Twelvie: haha omg I’m posting that to my Snapchat, have I added you, wait do it again for my story
Person: omg stop it’s so annoying just go sit over there with the little cousins

twelvie: wtf no I’m way too old for them, they are like babies hahahahaha, btw look at my tick tok
Person: omg ur such a twelvie
Twelvie: hahaha a twelve yeah right!!!! I have 8000 Tik tok followers, 1v1 me mate!!!
by Dog walker 69 February 27, 2019
Get the Twelvie mug.
Somerset skatepark group- commonly known as creature that vapes, makes obnoxious noises and litters. Scientific name- Bella soils, Isla douglas
Those twelvies are so annoying! i know right..look at them drinking all that soju
by lskkdjf November 28, 2021
Get the twelvie mug.