1) A most wonderful band in the opinion of many. They actually came from humble-to-hectic roots in California- all children of deadbeat parents, but all musically talented. Their usual music is literally exactly what an unhappy, confused, and possibly disgruntled teen goes through; subject matter ranges from sitting around being piss-drunk or stoned out of your mind to being afraid of love.

Now, sadly, it seems that this music has changed, as well as the Green Day image we all know and love. Since when have they swapped ratty old blazers and jeans for tight black pants and pyramid belts? We miss the old Green Day, even though their new music isn't too shabby.

2) A full 24 hours spent smoking marijuana.
1) Billie Joe Armstrong, Mike Dirnt, and Tre Cool are the 3 members of Green Day. Currently, they also have Jason White- backup guitar, as well as other various musicians who help them play. They're quite rad.

2) God, you're really fuckin' lazy! You've had two green days in the past month. Get a job or something, you sad-ass.
by ska-o-riffic! April 10, 2005
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A once kick ass punk band
They started out as "Sweet Children" Playing an infamous punk club called gillmans street
later touring the u.s. and making two albums before releasing a punk masterpiece: Dookie
This did attract a lot of younger people and the people of gillmans street labeled them sell outs

In response Green day released Insomniac

A bit like dookie except a bit harder and faster

Then after that i call the downfall
They released Nim rod: A weird experimentation of Green day's sound then they released Warning
A bit more "poppy"

Then they released the all terrible: American idiot which they are now known for
If you really apreciate green day

you would of liked their first four albums
1. 39/smooth

2. 1,039/smoothed out slappy hours (combination of first album and EP's
3. Dookie
4. Insomniac
Girl: ZOMG BILLIE JOE IS SOOOOOOOO HAWT!
Me: You have failed to recognize the true talent of green day
by The open minded metal listener December 19, 2010
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Not to be confused with the American punk rock band formed in 1987, Green Day is the slang term used for that final stage in a head cold or sinus infection during which copious amounts of green mucous and nasty phlegm and discharge come pouring from your nasal passages, throat and lungs. Green Day's arrival is generally a sign that better days are ahead and the wretched demon virus is nearing the end of its course.
Constance was stricken with a wicked virus and her sinus was clogged for over a week. She was excited and welcomed the arrival of Green Day and she started to get some relief although it was quite phlegmy for a while.
by Eaton Holgoode February 23, 2014
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Green Day is, like the best band in the universe! Their songs are fricking awesome, the band members are hot especially Billie Joe!, all in all, Green Day rocks my socks! I highly advise listening to them.
Green Day is cooler than you'll ever be
by Loserette from Loserland April 12, 2022
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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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An American rock band formed in 1987. The band consists of Billie Joe Armstrong (vocals and guitar), Mike Dirnt (Backup vocals and bass guitar) and Tre Cool (drums).
After releasing the album "American Idiot", they gained a great deal of popularity. The album deals with the George Bush era and the Iraq war, as well as being a teenager in disadvantaged areas of America and thus being without prospects for the future.
Their latest album, "21st Century Breakdown", deals with the economic crisis, war and religious fanaticism amongst other themes. Although musically their latest album is not considered to be as strong as "American Idiot", it's lyrics are very advanced.

Green Day are different to many other modern bands in that they sing and play music about the objective world, about relevant issues which affect a lot of people.
Green Day are a breath of fresh air in the current musical world.
by ShineOnYouCrazyDiamond August 9, 2009
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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 3, 2004
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