4/20 

The word 4/20 comes from a couple of things firstly, a young man (greek) by the names kosta h(btw i hear his hot) or so not sure about his full name invented it by smoking tons of weed euuurddaaay at the same time he noticed a pattern in this. Everyday it would be at 4:20 after school... so from there he new he had to start calling it that. Secondly 4/20 is also a cops way of reporting that ppl are smoking weeed. thirdly, an event in amsterdam (weed capital) at the 4th month of the 20th day of the 4th hour of the 20th minute evryone in amsterdam would smoke the mary-jane.

"hey common lets go 4/20 (ppl dont noe wat it is so lets call it that and wont get caught XD)"
" we have a 4/20 in progress at jane and finch"

4/20 by Bikemaster April 21, 2009

4/20 

1. Hitlers Birthday not Weed day.

Mary - ima be 4/20 blazin

Greg - You are gonna be smoking Hitlers B-Day?

4/20 by mrcannoli1997 July 2, 2015

4/20 

The day where you smoke weed.

"Bro its 4/20 are you stoned yet?"
"Sah Dude"
"So thats a yes"

4/20 by swaggy123456543234567654345678 June 3, 2016

4/20 

The day where the Columbine school shooting was commited. 4/20/1999

Damn, I really feel for those people who's kids were killed on 4/20

4/20 by KnightRyder364 February 15, 2017

4/20 

4/20 the day where its legal to smoke pot/weed anywhere

tasha: so wtp for 4/20
jay: smoking weed in front of cops is illegal

tasha: not on 4/20 so we gonna do it

4/20 by issa_sav_life May 28, 2018

4/20 

The one day where cops can't arrest you for being in possession for marijuana.

Man 1: Hey guess what day it is?
Man 2: What?
Man 1: 4/20 bro!!
Man 2: Hell yeah bro!!

4/20 by Bottletop69 May 28, 2018

4/20 

many people consume weed, or marijuana on April 20th because the abbreviated version of the date is 4/20

Alex: "What do you wanna do for 4/20?"

4/20 by 0110101010101001010010101 April 20, 2019