mny favorite day of the year. 4-20 is cop code for weed posession so us stoners used it to our advantage :)
4 20 today woot! im gunna go hotbox my car.
by Qwerty April 21, 2004
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The temperature in degrees Farenheight which marijuana has to be heated to to work.
Make sure to heat those brownies up to 420 degrees when you bake them.
by PB April 22, 2004
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dipshits. none of u know it. 420, started by the grateful dead (im pretty sure its them and not the waldos) cuz the waldo's couldnta started a worldwide thing, u dumbfucks.and its when u get high, the date is all messed up, cuz poseurs at my school got arrested for gettin high today, cuz right now its 4/20, and t heyre losers cuz they dont even know whatit is. dude, theyre fuckin poseur ass gayasses
by fuckyou April 20, 2004
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420 was a police code, I believe in a California city, way back in the day. 420 was the code they used for person/people who were smoking marijuana. The term has been used by most every American teenager. Many people use it as a time to smoke. I know of people who consider 4/20 (April 20) a holiday of sorts.
"It's 4:18 roll the blunt(joint)/pack the bowl(bong,pipe) so we're ready for 420"
by Philly MILF August 10, 2007
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It means marijuana, it came from the police code for posession of it, which is 420. It has transformed into a time of day that stoners take heed to and smoke to celebrate that 4:20 has come around. April 20 is also known as the international get high off your ass day. Coincidently, it is the same day as: the columbine shootings, hitler's birthday and earth day.
1. Rodger that, we've got a 420 down on Mulhand drive. Need backup.

2. Somewhere its 4:20. (Lights a bowl)

3. Only a week till 4-20, I'm excited.
by George January 18, 2004
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420 is code used by police that means posession of marijuana, you're all fucking idiots acting like you know when you don't
officer: just pulled over jay and silent bob on a 420
by saa_rrah December 6, 2007
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ok all u ppl r wrong 420 is the day and month weed was discoverd april 20th.....discraces
yoooooo its bout to b 420

i no im bout to get an "O" of tht wangin dro
by boobiemon420 December 16, 2007
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