267
Probably the best punk band in the world. Sings about everything there is to be angry about. Plus Billie Joe Armstrong is extremely hot.
Rachel: OMG you guys have you ever heard of Flyleaf? They are so gloriously emo!

Taylor: I so love Korn!!!!

Elizabeth: You're both noobsickles, listen to some Green Day why don't you!
by this_is_emo_right March 20, 2010
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268
1. Day spent smoking pot

2. What used to be a good band until the release of thier 2004 album ''American Idiot'' Now everyone and thier grandma is a Green Day fan, when most of these newcomers have not heard of them before idiot. Now all you hear is how hot Bilie Joe is or ''DON'T WANNA BE AN AMERICAN IDIOT! YEAHH WOOO!'' Seriously, grow the fuck up, face it thier sellouts
1. I don't feel like going to school, let's have a green day

2. For further information about the band, please see sellout
by DizzyLizzy March 10, 2007
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269
An impossibly bad melodic pop band from Northern California, often mislabeled as punk because of their early association with the Gilman Street Project, and their cynical appropriation of mainstream "punk" fashion and attitudes. Frequently referred to here as "the best fucking punk band ever," by people who are evidently completely unfamiliar with the genre. Recently ripped off a bunch of Clash riffs in a transparent bid to be taken seriously.
Mozart: "I did not know that such music was possible."

Oh, yeah, don't forget to mention Green Day.
by PimPamTheElephantBoy August 18, 2008
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270
An pharse derived from the early days of Langley Park secondary information to insult someone who is being a bit emo.

Extension of "green" is obligatory.
"Oi GREEEEEN DAAAYYYY"
by morgangills November 12, 2004
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271
noun1: A punk rock band who have totally sold out due to American Idiot, which is bollocks. Nethertheless, they used to be pretty cool, and i recommend Kerplunk! still.
noun2: A day which is particularly green.
1: Oh meh gawd Green Day used to be so brilliant *recites all of International Superhits*. Shame they're wank now.
2: Random Kid: Y'know what? yesterday i felt like it was a Green Day.
Random Kid's Friend: Alright!
by Tom Reeves March 06, 2005
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272
1)The coolest rock band ever. lead singer, billie joe armstrong, drummer, tre cool, guitarist, mike dirnt. took of in 1994 when they released dookie, and again when they realesed Good Riddence in nimrod. suddenly became "the best band in the world" when they realeased american idiot. now, eveyone's fave. band is green day, and their fave. song is boulavard of broken dreams. their old songs are sooooo much better.

2)a day where all you do is smoke marajuana
dude, lets go have a green day!
or
Dude, green day is the best band, but i love god riddence!
by I love Green Day September 26, 2005
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273
Way of expressing contempt towards greasy rockers.
"Oi Costello, GREEENEEEN DAAAAYYYYY"
by Keir's ginger mum November 09, 2004
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