belle and sebastian - characters from some children's book i think..?
greenday - they quit high school to form the band or something and after telling the school principal their plans, he responded with, "you're going to succeed when there's a green day in hell."
jimmy eat world - the lead singer, whose name is jim, had a little brother that drew a picture of him eating a globe. underneath the drawing, he wrote "jimmy eat world."
kid rock - after doin' his thaaang, some guy shouted out, "look at that white kid rock!"
limp bizkit - they were stuck on a name and finally one of their friends offered this stupid suggestion. it just stuck.
marilyn manson - he wanted to portray both glamour and horror: marilyn monroe + charles manson.
postal service - the members weren't physically together, so they ended up mailing each other ideas through letters.
righteous brothers - after performing, a marine yelled out, "that was righteous, brothers!"