The age you stop being a teen, the year before you turn 21.
by Shantelle. April 6, 2009
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Marijuana (or) weed, usually smoked with a pipe or bong. (Word taken from movie 'Friday')
"I got that 20 20 for friday night" - Jason
"ohh yeah. We goin fo' 20 20!! Niiiiiigga!!" - Jack
by Jack Sprack October 15, 2008
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a). {x e N : 19 < x < 21 }.

b). set theory. The cardinality of a set containing twenty objects.

c). The number of years you spend in jail for assault with a deadly weapon.

d). The age which is slightly less worthless than 19, and slightly more worthless than 18. The age at which you are considered to be well into fully legal adulthood, yet the government still deems it necessary to babysit certain aspects of your life. Despite the notoriety of turning a new decade, turning 20 doesn't mean a damn thing.
Last night, bobby smoked exactly twice as many joints as he could count on both of his hands. How many joints did bobby smoke?

Answer: 20
by General Septem October 4, 2009
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20 inch wheels (20" dubs) keep em clean
by L-evate April 29, 2003
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Bag of Weed, costs $20.00 dollars and is enough to make 4 fat joints.
I know this dealer that sells 20's.
by Sara January 26, 2005
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Location.

Derived from the lingo of CB radio users
Gimme a radio check willya oh and what's yer 20?
by Dirge October 30, 2004
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