A group of kids who happen to like the same type of music as is 'in' at the moment. It is possible that they liked these bands before many others heard of them, and will continue to like them after the phase has passed. Ditto clothes. They have only been labelled 'emo' since the word came into popular culture, and is not one they would give themselves. They do not all self- harm (there is a difference between 'emo' and 'manic depressive') and do not all wear thick- rimmed glasses or wear all black.
Poser: What you listening to?
'Emo' Kid: *names band not many have heard of*
Two months later, the band have made it big and everyone knows them.
Poser: OMG, I love this band!
'Emo' Kid: You didn't know them two months ago.
The band become 'uncool' to be fans of.
Poser: You STILL listening to them?
'Emo' Kid: Yeah. So?