15
1) A band that many people are starting not to like just because everyone else does, and they think it's "cool" not to go with the "fads". When in reality, the band is atleast 15 or 16 years old. Also, some people are stupid enough to think they're a new band.
But is a seriously good band, has always been great. People tend to split the group into "New Green day" and "Old Green day".
1) " Dude, I like Old Green day way better than New Green day"
2) "Ew, my best friend likes Green day, and like, no way, they're too mainstream"
by Hannah_t August 13, 2005
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16
Slang for a day containing alot of green bud where you would just sit around taking bong hits, and hanging around.
Hey, yesterday we had a green day!
by bloodbanx.com January 23, 2005
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17
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 09, 2005
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18
A day spend sitting around, smoking pot and doing absolutely nothing
Yesterday i smoked pot all day so i had a green day
by Nibsy August 23, 2005
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19
for a bunch of "fans" you could all at least spell the band name right. See Green Day, not Greenday.
Also, a green day is when you do nothing but sit around and smoke weed. It is also the (mispelled) name of a great band, that has been around since teh eighties.
Its green day, not greenday.
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20
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 03, 2004
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21
i smoked enough weed yesterday to have a green day
by Omar S October 20, 2006
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