Twelvie

A kid ages 12-15 who acts and thinks they are older than they actually are.

A group of twelvies outside smoking.

by Adolescence January 8, 2017

Twelvie

A word used to describe any teenagers between the ages of 12-18.

Anyone who is under the (Australian) legal age.

Person 1: I can't tell how old these girls are with all their makeup.
Person 2: Oh, she's a twelvie trying to get in a club.

Person 1: So many twelvies around.
Person 2: It is school holidays.

by Squisheee October 26, 2014

Twelvy

Rural slang for a 12 gauge shotgun

I didn’t use a 20 gauge at the range I pulled out the twelvy and aired it out

by Someonenun January 4, 2023

twelvie

someone who walks around with an iPod, pretending its a phone

Mia is a twelvie, even tho she isn't tweleve.

by bringbackthestrawssupporter September 11, 2018

twelvie

a person of the opposite sex who is noticeably younger than yourself, often caught checking you out. Usually they appear to be twelve years old, hence the term twelvie.

That twelvie over there was totally checking you out. You're old enough to be his aunt or something.

by mllelanoir August 30, 2007

Twelvie

The Police. Any law enforcement agent. See also "12", "PO-PO", and "ONE-TIME."

Twelvies erywhere, but they won't get me.

by bearknife March 18, 2014

Twelvie

Mainly used to describe young (12-15) rich white boys and girls who use their parents money to buy marijuana. Then they proceed to post about it all over social media, eventually proceeding to them being caught by their rich parents. Then the cycle starts all over again.

"Did you see Lucas new post on Facebook?"
"Yeah, his parents found it."
"What a fucking twelvie!"

by ThotHoe March 6, 2017