There are 2 possible variations of this word.
1. A person who due to circumstances, more often than not out of his control, is in a depressed state wherein the person can be happy and outgoing one moment to depressed and distant the next. Doesnt always have to dress in dark colors or have dark hair but is sometimes a sterotypical characteristic than may or may not be true in said case.
2. A person who actually has little wrong with their life but tells everyone they do as to attract attention. It is thought that by doing this they may be 'cool' or 'in' but in reality is not being who they are and is closely related to 'scene'
1. "Hey guys, you wanta hang after school today?"
"Sorry guys, i just cant hang out right now... i dont even want to talk to anyone."
2. "When i go to this new school i think im gonna change my look. I hear 'emo' is popular there so ill stop by the store and get some hair dye and dark clothes"