20 

"twehn-tee"
"twuhn-tee"
"tweh-dee"
"twuh-dee"

*The 20th number in the infinite line of numbers, whether positive or negative.

*The most common dollar bill, also the one to receive upgrades to fight theft & counterfeit, etc.

*When you hit age 20, you have one more year left to finally be able to legally drink and buy handguns.

*The number of words you can send to Urban Dictionary per day.

"20 is a common number, especially thanks to the banknotes."
-me

"I can't wait to be 21. I'm 19 though."
-me

"Why Urban Dictionary!? WHY!?!"
-me

20 by Dave September 10, 2004

20 

Used after a noun to describe it in the superlative. Derived From Championship Manager and later Football Manager stats, in which 20 was the maximum a player could have for any given attribute.

If you saw a girl with big breasts you might exclaime "waps 20!"

20 by Chris Cowley May 23, 2007

20 

The old age and death of a typical anime character.

You only see a big-eyed, towheaded schoolkid either in tweens or between ages 13-19 in the anime/manga world. Never 20 or older.

20 by Screambug January 12, 2006

20 

short for 420 or referring to weed

Man:Yo lemme get some 20

Drug Dealer:Alright

20 by YMCT June 18, 2016

20 

Bag of marijuana, also referred to as a DUB sack.

YO, let me get a 20 dolla holla!!

20 by MOUNTAINMANNN October 16, 2008

20 

Often used in drug sales, refering to the price of drug in question, usually marijuana.

"Let me get a twenty of da sticky-icky..."

20 by CrashBaltCityPD175 December 30, 2002

20 

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20 by I LIKE CHEEEZE September 30, 2019