The unsimplified version of 1/5 for a bunch of dumb asses who never passed elementary school math and subsequently never learned to reduce fractions.
Person 1: Hey, ready to celebrate 4/20?
Person 2: Actually, I will be celebrating 1/5, since it's the mathematical equivalent to 4/20.
Person 1: ...k...
by Mr. Guam April 20, 2015
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The day where a bunch of people go up to parliament hill (or they go anywhere) and smoke pot (weed) because the police can't get them in trouble because so many other people are doing it too! It's basically the one day that yu can smoke pot without getting into trouble...
Hey, it's 4/20, let's skip school and smoke some pot up on Parliment hill! (Ottawa)
by Litlock February 24, 2012
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Time to get high. Very, very high.
"Later on that there day
My homey, Dr. Dre
came through with a gangk of Tanqueray
And a fat ass J
Of some bubonic chronic that made me choke (shit)
This ain't no joke
I had to back up off of it and sit my cup down
Tanqueray and chronic, yeah I'm fucked up now"-Snoop
by Jonny Blaze April 15, 2004
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There is a belief that it is a code used by the police to describe an offence in progress, saying something like "We have a 4:20 in progress", meaning someone or people are smoking pot. Generally, potheads or stoners will refer to smoking pot at any time as 4:20. 4:20 on April 20th is the ultimate 4:20 of the year.
Hey dude, what time is it? 4:20 man.
(the time could be 9:45, but since they are smoking a joint it is 4:20)
by Mark B January 28, 2005
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D = 4th # in the alphabet,
T = 20th # in the alphabet,
4:20 = Dope Time
Its 4:20, time to blaze!
by KillaDro December 23, 2005
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This time will only happen 2 times on 4/20/2020 at 4:20 AM and 4:20 PM and will never happen again.
Guy #1: The time is 4:20 on 4/20/2020. Guy #2: Let's smoke up! Guy #1: Yep.....4/20/2020 is also the same day this was published on Urban dictionary! ✌️
by JoeyBomm April 20, 2020
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The nationally accepted time or date on which the majority of occasional or chronic marijuana users choose to get high from the smoke of cannabis leaves.

Although it is apparent that 4:20 may indeed have originated from H.P. Lovecraft, in addition to many other contrasting theories, it has nevertheless been apparent to me that the first two digits of the number are 42, a number which clearly derives its significance from Douglas Addams in The Hitchhiker's Guide to the Galaxy, in which he claims the number to be "the answer to Life, the Universe, and Everything."

Nevertheless, the true meaning of 4:20 differs from person, and perhaps it is best that everyone may have his or her own personal meaning of the national holiday.
Person 1: "You know, I really wonder...Why is it that we all choose 4/20 at 4:20 to get high?"
Person 2: "You know, I'm really too stoned to care right now."
Person 1: "Yeah. Now what were we just talking about?"
by Uexdrukl November 7, 2007
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