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4.
my favorite holiday
Unlike the holiday season, jews and christians alike all get together to smoke up on 4/20.
by Buffalo billy bobb July 08, 2009
 
1.
The day to smoke weed... April 20th. Or every day at 4:20.
It's April 20th lets smoke an ounce
by Anonymous October 11, 2003
 
2.
1) Adolf Hitlers Day of birth.

2) Smoking Holiday (4/20 any year)

3) Rumored Some college students would smoke everyday at 4:20 pm
My PC clock says 4:20 haha.
by BObo D. HObo July 22, 2004
 
3.
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
 
5.
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
 
6.
A holiday self established by marijuana smokers that takes place on April 20th.

Originally started by a group of college kids who would meet at a statue everyday at 4:20 PM to smoke weed.

Some other drug usage may take place but marijuana is the main one.

Pronounced "four twenty", if you say, "four hundred twenty" you'll look like an idiot.
Me: My dad got so baked yesterday.
You: Why?
Me: It was 4/20.
by dotVillain April 21, 2009
 
7.
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