One of the many names for weed. Its mainly in reference to time. But theres also April 20th.
Its 4:20, gota hit that bowl.
I cant wait til 4/20,(april 20th) Im gona be stoned off my ass.
by Sonja February 19, 2003
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1. Natioinal Smoke Marijuana Day.
2. Hitler's Birthday.
1. Stoner 1: Hey man it's 4/20! We finna get high as hell!
Stoner 2: Fasho!

2. Happy Birthday Hitler?
by cubear69 April 27, 2009
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a TIME in the 70's where a group of teens would gather after school got out to smoke marijuana. 4:20 was the perfect time because it was after school, enough time to get the weed and smoke before parents got home. since then april 20th has become a "holiday" in which people celebrate smoking marijuana! also, 420 is NOT a police number and they do NOT say that when they see people doing drugs.
"you wana get high? afterall it is 4/20."

"happy holidays, its 4/20"
by wallyworld girl April 20, 2010
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April 20th; A day where actual cannabis-smokers do the ganja. Also the day where a bunch of poseurs claim that they're gonna smoke weed on that day to try to be cool, but really don't.
So, I don't do marijuana on 4/20. Fuckin' sue me.
by Mike of the Narkotics. July 11, 2008
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Supposedly "420" was a code used by the San Rafael police department, however, the department has always denied this. A group known as the "Waldos" claim to have originated 420 in San Rafael in 1971. The group met every day at 4:20 PM after school and eventually began to use 420 as a code for marijuana so they could talk about pot in front of parents and teachers.
Can't wait til 420, I'm going to blaze out of my mind.
by Drew April 4, 2004
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Hitler's birthday and the anniversary of Columbine. A lot of people smoke weed on 4/20, which is cool but other than that it doesn't look good on the planets reputation.
I'm gonna go smoke weed now.

4/20 is a very awesome day, as long as you're not a parent who's kid got killed at Columbine.
by jmann578 September 17, 2013
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Unlike the holiday season, jews and christians alike all get together to smoke up on 4/20.
by Buffalo billy bobb July 8, 2009
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