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 22, 2009
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The universally accepted time to smoke marijuana. Began when a group of high schoolers in the '70s from San Raphael High School in California decided to meet up every day at 4:20 to smoke.
"They had just bough a sack weighing 3.5.
It was 4:19, just about that time. i.e., almost 4:20
They pulled out the binger and I started to drool.
It was the five-foot caustic weapon crystal, too.
I caught the fumes and I lost my mind,
Happens every time that I smoke the kind."
-Wasting Time, by ALO
by OneTimeOnly January 10, 2007
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International Smokers Holiday, celebrated on the fourth month twentieth day on the fourth hour and twentieth minute p.m. (also a minor daily tradition to smoke at 4:20 p.m. tradition started by a group of students in california that used to meet at a certain place at this time after class daily. (normally marijauna), 4:20 was a code word so teachers and administration would not catch on to their activities.
are you down for 4:20? sure!
by Thomas Watkins January 24, 2008
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The day to smoke weed. It is based off of what police say when they see people doing drugs ("We have a 4/20 on...").
It is celebrated internationally and people also wear green on that day. It is also Adolf Hitler's birthday, and the date f the Columbine School shootings. Pronounced "four twenty."

Yo man, I got some fresh Columbian weed for us to smoke tomorrow... after all, it is 4/20.
by Jamesman9240 April 19, 2007
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The day after 4/19.
"What's todays date?"
"Well yesterday was 4/19, so today is 4/20."
by GLEAS01 April 12, 2009
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On April 20th all the potheads around the world light up and get baked at 4:20 pm.
"Yo dawg it's 4:20. Lets get a 50 bag and get fuckin jacked."
by Camdizzle September 30, 2004
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