Green Day is a punk-rock band .. some people disagree b/c they "sold out".. but billie always says it was the atmosphere of punk rock he liked the best... not the unsuccessfulness... there are the people who say that Green Day's recent cds are mediocre ... they are not. They have a depth that not many musicians have claim to. If you can't see that, you are not really listening to the words very well ... the whole american idiot cd wraps into one story, thats why the musical was made... 21st century breakdown also follows a story line of christian and gloria... it is for the class of thirteen, 2013, meaning the future generation .. telling them to stand up for the truth ... do not settle for lies... their older CD's were great as well but never had as much depth as these two .. my favourite song though is an older one .. minority ... you have to admit though green day before Warning was random songs about love, insomnia, masturbation etc. On another note people are saying that the fans who became fans after boulevard are stupid teenie boppers.. I personally had never listened to the radio before then .. all i had ever heard of before then was michael jackson, nelly furtado, vanilla ice, the beatles.. and other random things my dad played for me... so its not really my fault if I have never heard of a band... you cant say I just like the punk pop sound cause i love all their songs... I have never come across a green day song I didn't love.
Cynic: "You teenie bopper!! You only like Green Day for Billie Joe and its pop mediocre sound!"

Me: "I'm eighteen actually and I had never heard of Green Day until Boulevard of Broken Dreams and actually I didn't actually like the song until I listened carefully to the words...also I have all their cd's including 39/smooth and foxboro hot tubs... btw.. billie joe could be my father... his son Joseph is the same age as my brother... so run along now!"
by A very offended Green Day fan January 18, 2010
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A day spent smoking marijuana.
Saturday was a green day.
by Anonymous September 18, 2003
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
1. A day which is mainly spent smoking the drug marijuana, in an effort to end boredom. May have originated in California in the mid-80's.

2. A popular punk rock band with members from Rodeo and Willits, California.
1. I had a green day yesterday.

2. Mike Dirnt and Tre Cool are also members of Green Day.
by Crispy September 01, 2004
Quality band which poeple tend to see as sell outs because of their last album American idiot. For me they will always be remembered for Insmoniac and dookie two of the best punkish albums I have in my collection. Unfortunatly their main following now consists of teeny boppers who only discovered Green day existed when Boulevard of broken dreams came out and wouldn't know "At the library" from "Westbound sign" Still i suppose they had to find someone to fantasise over after Busted split up. DAMN YOU CHARLIE!!
girl 1: "wow have you heard that new band Green day?"
girl 2: "Yeah, billie joe is gorgeous"
me: "For gods sake! they have been around for 15 odd years!"
girl 3: "really? wow do you reckon Nirvana will ever get back together? that would be qualtiy"
me: *sound of me crying on the floor in utter despair*
by Guvnor P June 27, 2005
1) A day to smoke weed.

2) Popular American pop-punk band with such classics as Good Riddance (Time of Your Life), Basket Case and Longview. Sometimes said to be inspiration for various later pop-punk bands.
1) It was a green day.
2) I am going to the Green Day concert next week.
by jazzpup February 04, 2005
1) An awesome rock band lead by singer Billie Joe Armstrong that has many hits like When I Come Around, Welcome to Paradise, Basket Case, She, Brain Stew, Time Of Your Life, Warning, Minority, and Don't Wanna Fall In Love
2) A day when you just sit around and do nothing but smoke weed
1) Man, right now I'm listening to a Green Day CD and the songs are awesome!
2) That stoner's has 1 too many green days. He's trippin, man!
by 000 March 22, 2004
Californian punk rock band. Includes Billie Joe Armstrong, Tre Cool, and Mike Dirnt. They formed together in 88 and released their first album in 1991. They became famous for thei album Dookie in 1994, but really hit hard with their 1997 single Time of your Life from their album Nimrod. Also, the GREATEST BAND EVER!
"Green Day rocks!!"
"Dude, I TOTALLY agree!"
by Fini August 08, 2004
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