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what's your 20, fool
by alpha March 20, 2000
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The age where the bouncer stops asking for your fake ID.
Seven-foot-tall gentleman whose name is Tyrone: "Yeah, you can come in."

Me: "Uh, you sure? You don't want to see my license?"

Tyrone: "You're 20, no one gives a shit."
by Twenty Years Old, Still Virgin January 26, 2013
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the number before 21 and after 19. generally used when counting.
by Room-101 February 7, 2004
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part of a series of '10-codes' that many security officers & law-enforcement-types use, the '10-20' code refers to receiving a location coordinates from a second party at the other end of the line (over distance radio transmission). '10-4'- meaning that the transmission has been received.
"Soldier.. what's your 10-20?" often shortened to: "what's your 20?"
by xyzzy ëL§îX November 12, 2002
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The age you stop being a teen, the year before you turn 21.
by Shantelle. April 6, 2009
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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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