A group of white, mostly middle-class well-off kids who find imperfections in there life and create a ridiculous, depressing melodrama around each one.
An entire subculture of people (usually angsty teens) with a fake personality. The concept of Emo is actually a vicious cycle that never ends, to the utter failing of humanity, and it goes something like this:
1. Emo guy is just too much of a pussy. His penis is too small, he's too depressed to bathe, and has more mood swings than emo chick, and he doesn't even have a menstrual cycle. Emo chick dumps him, saying "It's not you, it's me." (lie) as she drives off with Wayne, the school jock and captain of the football team.
2. Emo guy goes home and cries, proceeds to write a weak song and strum a single string on his acoustic guitar. Another emo chick sees how he is so in touch with his feelings, and the cycle continues.