Per Videojug:

What Is Emo?

Emo is short for emotive or emotional and describes an emerging social trend. This film explains what Emo is, where Emo comes from and wonders whether Emos' are ruining the country!

What do you need to know to spot an EMO on the street, or to identify symptoms you've found in your children or even on your self.
Look out for dyed hair and mascara, this is a sure sign of EMO along with skinny jeans and tight printed band t-shirts. Button badges are so emo, and so are rockstar belt.
It is generally thought that EMO's self harm, but it is unclear whether this is true.
Watch out for their sheepish movements, the way they slouch their bodies and avoid eye contact.
So there you go ladies and gentlemen, EMO is real and its alive in our cities and towns as we speak.
Hate it embrace it, but understand it and we can all get along.