4/21

When you forget to get weed for the actual 4/20, and can't find any because everyone is using theirs, or you are otherwise unable to celebrate on the actual day. So you therefore celebrate the day after...4/21

Sarah: Hey, do you have any weed?

Megan: No, and I can't find any from anyone else!

Sarah: Damn... 4/21?

by classy pseudonym April 20, 2010

4/21

Used to describe a hangover from marijuana.

"What's up with you man?"
"Nothin, I'm just totally 4/21 right now"

by Mr. Washable October 18, 2008

4/21

An epic hangover

4/20: amazing day where everyone is hella fucked up all day.
4/21: the day after when everyone is too hungover to do anything and wishes it was 4/20 again

by prettylittleurbanprincess April 22, 2011

4:21

4:21 from a professor

The time you try and pretend it is still 4:20 (professors can still smoke on 4:21)

by Pallet Wizard February 8, 2019

9/4/21

September 4th, 2021

Also known as Pac 12 North implosion day

Oh yeah I remember when 83% of the pac 12 north lost on 9/4/21!

by Pac12chatmember September 5, 2021

4/21

National drug test day

Today's 4/21 that means it's national drug test day because yesterday was 4/20

by Jay_jr99 April 20, 2016

4/21

The day to smoke paper... April 21st. Or every day at 4:21

Aye say Jay J , It’s 4/21, u got the printer paper or the brown paper bag to smoke?

by jayjgreen April 21, 2021