Emos are humans that have feelings that can be broken easy sometimes if u are too rough on them they hurt themselves by cutting themself. Emos are very shy and do not talk much sometimes if they feel emotional they go somewhere and cry. So please dont hurt them or bully them they are really nice and sweet.
An emo can be defined as a person who wears slim-fit jeans and they can be in bright colors. This is coupled with tight t-shirts and can bear the names of emo bands. The look is also coupled with studded belts or wristbands too. You can get more details at http://en.wikipedia.org/wiki/Emo?oldid=0#Fashion_and_stereotype.