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The ancient celebration of 2/20. Nobody really knows exactly when it began, some say 1995, others believe its more ancient than that. The day is usually celebrated similar to a birthday party, with whatever festivities one desires. The most common celebratory party favors included but are not limited to: any flavor flavor and style ice cream and cake, various forms of cannabis, calling out of work/school, bouncy houses, drinking copious amounts of alcoholic beverages. If you have never celebrated 2/20, you really should consider making it an annual event on your calendar and enjoying the festivities. Your friends will enjoy it too.
David, "Hey Sam, are you going to Dustin's 23rd annual 2/20 Bash?"
Sam, "Are you kidding!? I'm the co-host this year!"
David, "That's awesome!"
Hot Female, "Ohh! A 2/20 Party? I haven't attended on of those in forever, may I come?"
Sam, "Yeah, the more the merrier."
David, "This is going to be the best 2/20 yet!"
2/20 by Rhyme&Reason February 13, 2018
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When a person with 2 years on the job falsely presents themselves as if they have 20 years experience
2-20 Bob keeps making assertions about practical application of procedure that he hasn't been here long enough to have even performed.
2-20 by CosmicGloryhole April 14, 2021

2.20 gary 

An 8 inch pizza with chips made by the women of acklam fish shop. Used to be 2 pounds but children of middlesbrough became exploited and ripped off for their hard earned dinner money. It was named a gary after the original owner who seems not to work there anymore.
Ill have a 2.20 gary with gravy and scraps
2.20 gary by Chris McMahon December 7, 2006
yo man i was on vacation and i did a 2 in 20
2 in 20 by fasev 3213 March 29, 2009

20 1/2 years 

An awkward age where one is not legally suppose to drink, but one can buy cigs and super lotto tickets. This age is further iritating since it limits one's abilities to legally gamble. However, fake ID's that are well made can sometimes give entertainment relief.
Guy 1: Hey man let's take a road trip and party it up in Vegas.

Guy 2: I'm only 20 1/2 years old. Gotta a fake ID?

Guy 1: Got it covered bro.

Guy 2: cool.
20 1/2 years by Lassie15 December 9, 2008
Half as hot as a 41
Hey John, there’s a 20 1/2 at 12:00
20 1/2 by thiswasmyonlyoption December 12, 2017