A sort-of punk rock band that was good but not extremely popular until recently, when thousands of teenyboppers found out about them on TRL, believing their newest and worst CD to date to be "teh bset". Now every fourteen year old in the country rants about how great Boulevard of Broken Dreams is and are known to exclaim things such as "OMG BILLY JOE IS HAWT!!!1" and "DONT WANNA BE AN AMERICAN IDIOT!!12". Their new CD is mediocre at best, so please listen to their other albums instead.
The typical Green Day "fan" has never heard of Nimrod or Kerplunk, but totally eats up the new pop-punk garbage.
by Chernorizets Hrabr March 16, 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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Green Day, A band that teens are going wild over, who probably don't know that they even had any other albums besides American Idiot and 21st Century Breakdown. A true Green Day fan would know about: Insomniac, Dookie, Nimrod, Kerplunk, Working Class Hero, and Warning. Now all you hear is girls screaming on about "OMG Billie Joe is so cute have you heard there new song 21 Guns OMG OMG!! There first album American Idiot was sooooo good OMG!!"
Girl 1: OMG have you heard of that new pop band Green Day!!??
Me: New? they've been around for almost 20 years!!
Girl 1: nuh uh!
Girl 2: yah they have
Me: thanks you must be a true fan
Girl 2: yah...my favorite album is Nimrod
Girl 1: Nimrod?? Whats a Nimrod??
Me: one of their albums
Girl 1: wait...

Girl 2: yah...
Girl 1: so your saying they have more than two albums...
Me: NO FRICKIN DUH!!!!
Girl 1: well i like their new stuff
Me: there new stuff is okay but it got to pop-ish
Girl 1: i thought they were always pop-ish
Girl 2: nooooo they used to be Punk
Me: COMPLETE PUNK

Girl 1: whatever
Me: non-believer of The Green Day
Girl 1: what
Me: nothing...you didn't hear anything
by XxLuvDentzxX December 4, 2010
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