a time to go smoke or the day everybody goes to smoke pot,or is also the day hitler was born
yo were gonna smoke on hitlers birthday its 420
by S.E. 24 January 19, 2009

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1. A popular term used to describe a weed smoking time created by the waldos because they always smoked at 4:20. it has spread into a code for smoking and now April 20th has been established as national pot smoking day

2. A number usually found between 419 and 421.

3. A police code for a homicide

4. (April 20th) Hitlers birthday
1. hey man its 420, time to smoke!!!
2. hey man i just counted to 420!!!!
3. -guy gets killed- (cop): WE GOT A 420!!!
4. hey man its the H-mans B-day, lets go heil and celebrate
by SinisterL April 24, 2010

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In 1971, a group of stoners at San Rafael High School, California, coined this word. It was originally 420 Louis, meaning they planned to smoke weed by the Louis Pasteur statue by their school (btw Louis Pasteur was a hygene expert just fyi) and they said it as like a code word so that they could talk about weed around their parents / teachers and they would not know what the hell they were going on a bout!!! They may have been trying to track down a hidden crop aswell, although that is a bit debated and may be in fact an urban myth. But hey, this is Urban Dictionary, so yea! And then the phrase gained use thanks to the Greatful Dead who publicised it in the 70s and 80s. Today, 44 years down the track, the Waldos are given full credit for coining the term and it still means weed. It is mainly used for fun, secrecy, ritual and protest. A lot of people who smoke weed have a lot of fun with this word, and nobody else really knows wtf they are saying! ... (except their hippy parents!!!!!!! lol oops!)
Oh hey dude, there was this one time at Dennys, I was like super super stoned, I think it might have been after 420!

420 is both a time and a day - It's 4:20 (20 past 4)), or Happy 4/20 (20th of April)

Let's go out on 420 at 420 for some 420ing!!!!!!!!
by sagibitchascent420 February 02, 2016

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The origin of the word goes long before it's use in the US for cannabis. 420 is common term in Indian subcontinent used for someone who is a thief/trickster/clever in mischievous way. The word originates by Penal Code of 1860 instituted by the colonial government of British India. Section 420 covers offences relating to cheating and dishonestly.

I am pretty sure someone from Indian subcontinent (pakistan, india, bangladesh), probably students, tricked some American pot smokers into using the word for themselves back in 1960s or 1970s. What else could explain that weird coincidence? In that sense they were "420" (mischievous trickster) who tricked people into using a (bad) Indian slang for themselves
Look, lets tell American pot smokers in our school that they should call themselves "420". (laughs Hehehee )
by Zuchi October 30, 2014

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So far the majority of you are incorrect.

420's origin IS known.

the term 420 originated at San Rafael High School, in 1971, among a group of about a dozen pot-smoking wiseacres who called themselves the Waldos, who are now pushing 50. The term was shorthand for the time of day the group would meet, at the campus statue of Louis Pasteur, to smoke pot. Intent on developing their own discreet language, they made 420 code for a time to get high, and its use spread among members of an entire generation.

So there ya go, someone's parents out there invented the term 4/20.
Yo is about time for the 420 man
by Jah Promise June 15, 2016

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People on gaming platforms who think it's cool to put 420 in their name. It also applies to anyone with weed related names.
"Look at that guy right there! His name is sUpAkUsH420. I'm pretty sure he thinks he's cool because he smokes weed."
by A straight edge November 15, 2009

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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 29, 2013

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