A terribly misconstrued and misused word. In contemporary culture it is utilized as a broad term to describe a multitude of children and teenagers who straighten their hair, have their hair in their face, perhaps dye it black, and wear tight clothing. Unfortunately this is completely inaccurate. Actual "emo" music existed in the late 80's and was a subgenre of hardcore punk rock, after all, "emo" is a shortening of "Emotional hardcore punk rock". The people in early emo bands dressed like regular people, everyday guys/girls who just played music that they enjoyed. Sadly, since the formulation and ongoing existence of Hot Topic, the term emo has been incorrectly characterized for a little more than a decade. You have to wonder how the original bands feel about the slandering and mass misunderstanding and misuse of their originality with those of the unoriginal.
Just search Cap'n Jazz to listen to actual emo music.