Rule 420 states: When the time is 4:20, regardless of AM or PM, one has to go wild.

Guy: Dude its 4:20
Guy 2: *Goes wild*
by PremierAlan December 4, 2016
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Rule 420 states: When the time is 4:20, regardless of AM or PM, one has to go sicko mode.
Guy: Dude its 4:20 Rule 420
Guy 2:* proceeds to sicko mode*
by niggersarenotwelcome December 15, 2018
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at 4:20 (PM or AM) one must smoke any marijuana substance available. (this includes, but is not limited to, eating, snorting, fucking, cooking, etc.)
Girl: hey what time is it?

Guy: its 4:20 PM

Girl: i think im gonna go outside and smoke a cigarette.

Guy: Rule 420 bitch!
by GANJAGANJ December 18, 2008
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the rule in which you can not consume marijuana in anyway before 4:20 pm and after 4:20 am.
Guy #1 - Yo lets go smoke some bud, dude.

Guy #2 - Nah man its only 2:20, we still got 2 hrs.

Guy #1 - Damnnn, you're right its the 420 rule
by realshitfaced August 14, 2010
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