A standard scale from 1 to 10 used to judge how hyper, loud, or energetic someone is. When out with friends for the night, and someone is being exceptionally loud and annoying, they are "on 12".
Lucy: Is Maria coming out?
Mike: Yeah but that bitch is on 12 tonight!
by TheDarkFlower January 17, 2008
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A day that is significantly luckier than 11/11/11 that everyone should expect to make their biggest wish on.
12/12/12 is much more lucky than 11/11/11!
by dwightonmac54 November 10, 2011
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The date that comes after 12/11/12. Has no real significance in the way we live our lives.
Person 1: Do you know what the date is!?!?
Person 2: Wednesday?
Person 1: No! It's 12/12/12
Person 2: No, I'm pretty sure it's Wednesday.
by Skitzophrenic December 12, 2012
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Masturbating or ejaculating 12 times in 12 hours.
Dude, last night Bobby was challenged to the 12 in 12 challenge and he accepted! His dick's gonna fall off!!
by Tigs978 December 01, 2009
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The lighting schedule for growing marijuana indoors. 12 hours of sunlight/12 hours of complete/uninterupted darkness.
Just finished the veg cycle, now its time to change from 16/8 to 12/12 in order to determine the sex of my plant.
by amp9041 January 01, 2006
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This date will not come again in our life time and is very special. It is also 9 days before said end of the world so its not so lucky but if you wish hard enough it could save billions of people from sudden death
friend 1: omg its 12/12/12

friend 2: so what's so important

friend 1: this is never going to happen again

friend 2: oh okay
by Sierra Madison December 12, 2012
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