1. Age at which a person in the United States can drink liquor legally.
2. The day of the month when apocalypses are known to occur.
1. The 21st birthday is special. You can now enter bars and drink.
2. May 21, 2011, October 21, 2011, December 21, 2012. Need I say more?
by Zephyius May 23, 2011
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(someone already did this but they got it all wrong.)

9+10=21
by this byotch righ there January 10, 2021
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Croupier: '21 - we have a winner'
CardShark: 'Pay me out my one-and-a-half, biatch'
by Rock DJ June 24, 2005
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A number that used to be normal until a bunch of people stated saying it and it became so damn annoying
Person 1: 21
Person 2: Shut the hell up!!!!!!!!!!!!!!!!
by whoamI111222333 September 25, 2015
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That dumb number nobody will forget about.
by ZeldaCraft14 October 5, 2015
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unemployed/get a job
-Can be expressed with two fingers followed by a 1 finger wit the hand turned around, the number 21, or any pattern that has 21 in it.
On the job and dont want everyone in the room to know you think your close-buddy did something stupid. So you throw up a 21 (2 fingers followed by a one) when only he is looking to tell him to grow up.
by EroMod August 5, 2019
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