The number that follows 419.
<What number comes after 419?>
<420! You idiot!>
by BJ August 25, 2004
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Columbine Day. 4/20/1999 Eric Harris and Dylan Klebold commited the worst school massacre to date, killing 13 and injuring many more in their suicide mission at their local Highschool.
-What's with the date 420?
-Dude, it's Columbine day!
by bitchslap May 11, 2006
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Adolf Hitler's birthday. Therefore some hardcore white supremeist had tattoos with that number.

it is also Pot day, how unfortunate.
or conviently confusing.

Are they a pothead or a skinhead?
Hay nigga, watch out for that one, gotta 420 tat and looks like he got a white hoodie wida point to it
by Dick tastes like poop October 30, 2013
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An oustanding sailboat, used for recreational purposes and racing.
Damn, that's a hot 420.
Let's go sail some 420s.
by Maida May 7, 2006
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This supposed holiday was actually created by a Governmental Agency in an attempt to secure, arrest and imprison marijuana users. In 1957 a secret Government society ironically named "Numbers" was to spread word of a holidy. One that celebrated when marijuana was first discovered. Beware of this holiday, for it is more likely a Government conspiracy to attack marijuana users. Nah, I'm just fucking around. Does sound like something a pothead would say though huh? Paranoid anyone?
420 CyanideChild420... yahoo screen name. hit me up
by The Real Atrocious April 22, 2009
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This is the real definition

California Senate Bill 420 (known as the Medical Marijuana Program Act) was a bill introduced by John Vasconcellos of the California State Senate, and passed by the California State Legislature and signed by Governor Gray Davis. This was the bill that legalized medical Marijuana.
Do you remember that awesome bill that they passed called 420? Lets all go toke and get high on 4/20 to honor it!!

by J Mile 22 April 8, 2009
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420 means national weed smoking day, also it is a number between 419 421.
Man 1: Hey dude, its 420 today!
Man 2: Uh what's 420?
Man 1: The fourth month twentieth day.
Man 2: What? April 20th is 420?
Man 1: Ya its national weed smoking day.
by The real Samuel June 2, 2012
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