1. A day spent smoking weed, usually out of boredom.
2. A pop-punk band formed in 1988, with many good songs out like "When I come around", "Time of Your Life", "Why do you want him?" and more. I discovered them in 5th grade when hearing Boulevard of Broken Dreams on the radio. I looked them up and, well, fell in love with their old stuff as well as new (but preferring pre-American Idiot). But then, I discovered something in 6th grade called real punk. I really got into The Stooges, The Ramones, The Clash, Misfits, Sex Pistols, etc. A year later, I listened to American Idiot for the first time in years and came to a conclusion: that (new) Green Day, while being pseudo-punk and somewhat annoying, is a pretty unique band. Compare them to the other stuff that's out today!

HOWEVER, Green Day started an epidemic of a new breed of poser. It's when someone aged 8-13 believes they are "seeeeew punk rawk" when they listen to Green Day, Blink 182, or Avril Lavigne. They oftentimes don't even know who the bands I mentioned previously are. Those who like Green Day are often seen bashing Bush without even knowing if or even why he is a bad president. Now, not everyone who listens to said music is this way, just a vast majority. Not saying bad things about everyone who likes Green Day, just those who listen to them only and try to be something they're not. To conclude, a decent band.
1. Jimmy's so baked. It's definitely a Green Day...
2. Actual conversation:
Poser in my class: I just love Green Day omg!
Me: Do you listen to anything else??
Poser: Well my favorite artist is Avril Lavigne. It's just pure punk rock!
Me: Dude, thats not punk. Have you even heard of the Ramones? The Clash? The Sex Pistols?
Poser: Well, I havent heard of the Sex Pistols or the Clash. But the Ramones are gay!
Me: -rams head into wall repeatedly-
by Rachel_isapunkrocker May 17, 2008
A band is not punk,used to sound punk, but now are mainstream/alternative rock, others might include A.F.I. and Blink 182
Green day could care less about what music they play so long as they make a lot of money
by Drakethacrusty March 27, 2009
a green day is a wasted day where you do nothing but smoke pot (an illegal drug) it is also the name of a popular punk band.
ie. i am having a green day tomorow.
i like green day
by bob geldof February 16, 2005
1)A great band who know no restrictions in their music, and who really rock live.
2) bay area slang for a boring day, takeing bong hits.
1) The first time i heard Green Day, i coulnt belive my ears.
2) Today has been a green day, im so bored and wasted.
by . September 16, 2003
A Punk Rock/Pop band from Oakland, California. Started out in 1986 as sweet children and later changed their names into green day. Started releasing music as independant artists and in 1993 signed to a major label to release their hit classic, Dookie, which would go on to sell 15million copies worldwide. After their 1995 album Insomniac, the band would expirment with other genres such as hardcore punk, ballads and folk punk (as seen in Nimrod and Warning). The band's latest album, American Idiot, shows them experimenting with rock operas and more politically driven lyrics, as well as a less distortant, cleaner sound. Their new, political, left wing image caused many older GD fans to critisize them as "sell - outs" when they had been on a major label for over ten years. Sadly, most of their new fans only know them from American Idiot and never heard the old green day, who sounded more like a mixture of the Sex Pistols and The Ramones.
Haven't you ever heard wake me up when september ends? It's fucking great!

Haven't you ever heard Brain Stew, poser Green Day fan?
by BrandonRamone April 24, 2008
1. A day of smoking pot.

2. One of the best punk bands ever.
Girl: Billy Joe is so hawt!!!
Me&Freind: It's Billie Joe.
Girl: Whatev...
Me&Freind: Do you even like Green Day for their music?
Girl:Eww I Hate Punk!!!
Me&Freind: Freak...
by No-Name-Kid March 10, 2008
1. a day set aside to smoke grass.

2. a poser punk band from Oakland, California that whines about boredom. The singer sounds like he has a pile of shit in his mouth.
1. Let's have a green day!

2. the best thing you can say about the Green Day CD "Dookie" is that it has some tenth-generation Ramones chords on it.
by Starpunk November 07, 2006
A very popular pop-punk band formed in 88 in the Bay area.
Green Day members include Billie Joe Armstrong (Lead singer and guitarist), Frank Wright III (better known as Tre Cool, drummer) and Mike Pritchard (better known as Mike Dirnt, bassist). Many say that Green Day invented pop-punk and have inspired other pop-punk bands to start. Green Day release their first EP (1000 Hours) in 91, but had their first big hit (Dookie) in 94. Hit songs include, Basket Case, Brain Stew, When I Come Around, 409 In Your Coffeemaker, Good Riddance (Time of Your Life) and most recently Wake Me Up When September Ends.
by The Beast From The Middle East September 12, 2005

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