BackFire
Blood. It's nature's lube
Emo is the new "Goth".
In other words - It's a term used to describe a current fad, or trend, that many teenagers subscribe too, wherein they often look "sad" or "depressed". Other trademarks are box framed "emo glasses", a specific hairstyle, often covering their eyes and forhead. They also try to be deep and intellectual, achieved by the brilliant move of wearing nail polish and reading poetry they have from their 7th grade english textbook.
This has become something constantly mocked by people (myself included) because of the constant annoyance and obnoxious behavior of people who subscribe to the fad. There are many funny pictures, videos, and articles online that also mock the fad.
It originated from the Emo type music which I'm not very familiar with. But often, from what I've heard, has whining, a high pitched vocal style from the lead singer, and lyrics complaining about their "troubles". Others give political agendas that these "deep thinkers" eat up, and causes them to buy posters for at the local Hot Topic.
In short, Emo = Stupid.