The act of wheelieing a motorcycle until the tail touches the ground. Named for the front wheel being at twelve o clock
Damn, did you see Jon twelve his R1 yesterday
by Marnett December 29, 2005
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The Age I hated. Its when hormones are kicking in and you start junior high and all the drama starts. You Want to be treated older but every one treats you like a baby. but you are sooo close to being a teen you cant stand it. You secretly want sex but no one knows it because they, again, think you are a baby. Again, HATED it.
14-YEAR-OLD: Wow you are really hot

12-year-old: thanks you too

14-year-old: Wait how old are you?

12-year-old: twelve.

14-year-old: You are way too young for me. you're just a baby who dosen't know anything.

12-year-old: :'(
by Loveless <3 March 6, 2008
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To stand a motorcycle or other vehicle straight up in the air, front over back.
In motorcycle stunting, pulling a wheelie so high that the bike rests on the it's tail section is called a "twelve o'clock". The act thereof is called "twelving".
by ThrustinJ August 10, 2007
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Twelve is multiple things, hours on a clock, number of a dozen, months in a year, the number of steps needed to summon satan to earth, and the age of most cod players. Twelve is an awesome number.
Tannis's favorite number is twelve
by Jawen July 9, 2014
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a number, after eleven and before thirteen. anything else is classified as a regional colloquialism.
ten (10), eleven (11), twelve (12), thirteen (13)...
by brad March 13, 2004
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a dyme that gets 2 extra points for having a really good personality.

the two extra points is for personality (only crack heads add extra points on a scale of one to ten based solely on looks plus using any number higher just makes you look stupid).
scenario 1
Person A: "A dawg, that shawty right there is a twelve!"
Person B: "You mean a ten?!"
Person A: "Naw, plus two for personality."

scenario 2
Person C(for crack head): "Hey that girl is a FIFTHTEEN!"
/everyone looks at him funny/
Person B: "what are you smoking?"
by chewbaccaie February 9, 2008
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To 'space out'. Specifically the special sort of mental sluggishness brought on by watching television or any similar mental haze.
1: "Which street do we turn onto?"
2: "Huh? Oh, sorry. I don't know. I must have been twelving."
by Ninniane McFey October 12, 2005
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