1. A person who thinks they know EVERYTHING about Green Day but they honestly don't
2. People who spell Billie Joe Armstong's name 'Billy' and think they are 100% correct while real Green Day fans know its B-i-l-l-i-e NOT B-i-l-l-y
Green Day Know-it-All: "omg Green Day is awesome! i know like everythinggggg about them!"
real GD fans: "really then when is Billie's b-day?"
know-it-all: "feb. 17"
real GD fan: "yea.......... well if u really know EVERYTHINGGG about them, when was the band assembled?"
real GD fans: ".......oh my god....... -___-"
know-it-all: "(texting his/her friend): omg!!! did u c Billy Joe Armstrong last night on that award show?!?!?!"
real GD fan (relpying): "yea he looked sooo hot but ITS B-I-L-L-I-E! BILLIE! NOT B-I-L-L-Y!!!!!