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Greendayism 

A so-called religion that involves people who are totally obsessed with Green Day.
Green Day Fan: OMG I don't follow Jesus, I follow Greendayism!! DUH!
Greendayism by xX-dismal-Xx May 28, 2007
A common misspelling of the name of the band Green Day.
It's "Green Day," not "Greenday."
Greenday by Bob February 26, 2005
A Green Dayis a day spent smoking pot, many people do not know this but the name of the band also came from sesame street, in one episode Oscar the Grouch says "Im having a green day", meant to mean blue, or sad Day, Oscar used to be on the back of original copies of Dookie, but was removed when Green Day was threatened to be sued by Sesame Street. The Best fucking band ever...they are a punk band that has been around for 17 years, Lead singer Billie Joe Armstrong, drummer, Tre Cool, whos real name is Frank Edwin Wright III, and bassist, Mike Dirnt, whos real name is Michael Pritchard, got the name Dirnt because Billie Joe thought that it sounded like a bass (Tre's name means very cool in french)They are a band that was formed in the bay area of California, they have 8 albums, 9 including Bullet in a Bible, their huge album from 1994 was called Dookie, it sold 8 million copies which was their biggest album until their most recent album, American Idiot came out (10 million copies were sold)...many think that this is their best album, but most of Green Day's old fans feel that it is their worst...those who ONLY like American Idiot are POSERS...i hate posers!!!!! Green Day are not sell outs, many feel that sinse they sold themselves to Reprise Records(a major label) and gave up on Lookout records after kerplunk was released, they are therefore sellouts,(or not punk) they are not sellouts, infact this was the most punk thing that they could do...yes, Green day are infact a punk band, no matter how popular they may be...they are all unveleivably talented musicians, Billie Joe plays 9 instruments, Mike-3, Tre-3...Billie has been Married to Adrienne Nesser for many happy years and says that she is the only woman he will ever love, they are good, happy, and funny people, they are not loners, they are not posers, they are not goths, they are not gay, and they are not pop...some of their influences are The Ramones, The Who, the dead kennedys and the misfits, they are an amazing punk band!
greenday fucking Rocks!
greenday by FuckAnarchy907 May 30, 2006
Slang for a day containing alot of green bud where you would just sit around taking bong hits, and hanging around.
greenday by bloodbanx.com January 23, 2005
for a bunch of "fans" you could all at least spell the band name right. See Green Day, not Greenday.
Also, a green day is when you do nothing but sit around and smoke weed. It is also the (mispelled) name of a great band, that has been around since teh eighties.
Its green day, not greenday.
the way fucktardsspell the punk rock band Green Day. grrrrr
moron: omdz i lurveee greenday!!11
me: you are a retard, its green day!

ps: green day rock\m/
greenday by tara05 December 31, 2005
More from Urban Dictionary
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
"Hey, do you know that girl Sally?"

"Yeah, she's kind of annoying. All she ever talks about it ballet."

"Wow, what a Bunhead."

"Hey Sally, you want to hang out this weekend?"
"I can't, I have dance."
"You're such a Bunhead."

"Yeah... I know."
Bunhead by Jen00 October 24, 2014
Word of the Day on October 6, 2026

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026

Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026
Literally "dirty" pronounced with a West Indian accent. Can also have a positive connotation, for example Sean Paul's album title "Dutty Rock".
"The girl is pretty but she corrupt and dutty!"

or, in a positive usage:

"Booya! That freestyle was dutty!"
Dutty by J Hall April 3, 2003
Word of the Day on October 1, 2026
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