v/n :

Birthday
A slang way of saying "Birthday"
Also, "Happy Beer day"
A word originated from the Philippines. (Since there's no definition yet.)
Mark: Hey dude! Isn't it your beer day today?!
Allan: Hell yeah! c'mon!
Mark: kl! But we still have our final exams tomorrow, right?
Allan: Meh! It's only physics, it's gonna be EZ!
Mark: ayt! Let's get it on!
by theblob.jp May 26, 2009
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A Holiday created at Miami University (OH) b/c the school scheduled spring break over St. Pattys. It takes place every year the Thursday before Spring Break and is celebrated by bars opening at 5:30 am and students drinking Green Beer all day while still going to classes. Teachers try to stop this by scheduling exams but the students realize the Green Beer Day is more important and just show up drunk.

To show support of the day students wear t-shirts made for the day, green and gold mardi gras beads and often have mouths dyed green because of the amount of beer they have consumed.
I love Green Beer Day I have already passed out twice and it is only 3pm!!

I can't wait for Green Beer Day!!

What did I do on Green Beer Day, I wonder if i went to that exam.
by Drea Welke March 22, 2005
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An August 5th holiday celebrating the glory of Beer. Festivities include: copious beer drinking, double fisting, hooking up, and use of the word "beertastic"
Guy 1: I just called in sick for International Beer Day, let's hit the pub.
Guy 2: Beertastic!
by skyscotty July 9, 2009
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An excuse for people who like holiday and drinking to have a drunken day off in the holiday-less month of August. People internationally gather to drink beer (not necessarily international beer) on August 5th and practice the art of Beer it Forward.
My favorite holiday is International Beer Day, because it involves more beer and less ugly sweaters than Christmas.
by Yvonne23 July 10, 2009
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GBD is a day when miami university (ohio) students, and the locals, get wastey pants off green beer. usually, everyone ends the night with the poops and all the sluts puke an unfamiliar green (pink and blue vom is usually in their repertoire.)
OMG I can't wait for Green Beer Day, I'm so totes going to puke on that guys crotch.
by miami bitch March 2, 2012
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A bit like normal beers, except you have them during the day
Why don't we take a wonder in around lunchtime and get a couple of day beers?
by A.Anon January 28, 2013
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an alcoholic beverage, often brewed from barley and hops, that is consumed by a douchebag during the hours of sunlight.
Douchebag 1: What should be do in Williamsburg today?

Douchebag 2: Let's get a Day Beer.
by oidrtybtrd June 22, 2010
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