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"