A common mis-spelling of the band Green Day. I know we all make typos, but if you like the band, you should at least try to spell their name correctly.
"OMGZ I LuV greenday!!1!1!1"
by christie road January 15, 2006
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A punk-rock band that consists of a group of sexy mofos. These sexy mofos are Billie Joe Armstrong, Mike Dirnt, and Tre Cool. Many people consider them to be sell outs because they're music has changed over the years, but they've changed too. I personally think that all of their music is amazing, from Dookie to 21st Century Breakdown. If you have nothing good to say about their new music, keep listening to the old. It's still there. The name Green Day is based on smoking pot. The members of Green Day used to smoke pot but have stopped because of their families. Some of their hits include: Longview, Basket Case, Warning, American Idiot, Wake Me Up When September Ends, 21 Guns, and Good Riddance (Time of Your Life). Green Day has been around for MANY years even though many people didn't know it.
Bob: Did you hear about Awesome as F**k?
Rob: Yeah. It's a Green Day CD with live songs.
by A ninja-unicorn. June 06, 2011
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(n) 1. a band that used to be good but was taken over by middle schoolers, 9th grade girls, and fake-ass emo chicks.
2. a day where you smoke weed and drink booze; also called 420
1. Green Day is an example of, well, a Green Day band.
2. Stoner: Wow, look at me, I smoke weed, I'm cool, it's a green day.

Some dude: You mean, like the band.

Stoner: Uh, no...wait, what?

Some dude: Didn't you just mention the band Green Day?

Stoner: Oh, you mean the "I walk this empty street on the boulevard of cocks" guys.

Some dude: Yeah

Stoner: oh

(Stoner pulls out shotgun for no apparent reason and blows dude away, because thats always what happens at the end of these gay dialogue thingys)
by Dude Man guy April 21, 2005
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A day when one who personally does not have any marijuana of there own, still manages to get high all day, via friends, or just being in the right places at the right times.
"I was out of weed, but thanks to the generosity of my friends, I had a green day."
by Hondro March 03, 2004
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really good band. have been good since they started, which means that american idiot is not their first album. i do not care that people like their music now, but it would be nice if they would appreciate that they had loads of albums BEFORE american idiot which were equally as good. there is more to this band than 'hot' billie joe armstrong, which means all you idiots who think you are his secret wife or something should just shoosh. and american idiot and boulevard of broken dreams are NOT their only songs (horror of all horrors).
*silly girly girl* - omg! green day are just sooo amazing! i love american idiot! it's like, so totally the best song EVER! don't wana be an american idiot!
by jk March 19, 2005
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A decent band that earned the nick-name 'sell-outs' because their latest album, American Idiot, was popular.
Bruce: Gawd, Green Day is just a sell-out band. They aren't as good as they used to be.

Wayne: Why, because their album did well, and they gained a bunch of new fans?

Bruce: Well, the fans are a bunch of tweens that never listened to their old albums.

Wayne: Wow. I didn't know you had to like EVERY album and EVERY song they made in the past to be a fan of their current work. Dipshit.
by LadyHailey August 27, 2008
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