The act of taking a #1 out of where you normally take a #2. It's a nice way of saying you have liquid diarrhea.
I ate some undercooked chicken yesterday and have been on the toilet twelving all day.
by Markatak November 28, 2016
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"Twelve's deep out here tonight yo, Boriqua's ain't movin sh** till shift change"
by Keeler&Division Mama Queen April 21, 2018
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A term used to say police. Usually heard in the south or any predominantly black neighborhood in the United States.
"FUCK TWELVES!" - Migos Gang
by mr. stuhhlin' February 18, 2014
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Twelve- How anyone under the age of 25 appears to anyone over the age of 40.

Disparaging to their level of knowledge, lack of wisdom and their appearance.
What are you stupid? Oh..... no, you're only twelve.
by Morte_666 June 14, 2011
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A pretentious modern indie film, that tries too hard to be "gritty" and "edgy" in respect to modern gloom but falls on it's formalistic face
Ever since I saw how the movie my friends and I made turned into a twelve, I vowed to never make a film with them again.
by david lynched December 24, 2011
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The act of faking being high. Pretending and acting like you're high when you really aren't.
Yo Josh is so stoned right now!
Nah dude he only took one hit he's twelving.
by youalreadyknow892 July 6, 2012
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