Emo implies something that is emotional and sensitive. Emo people are depressed, stay serious, and quiet, most of the times. Emotional people tend to be attached to things and people very easily. Emo is also a term used for youth subcultures embodying emotional sensitivity.
Emo is a particular style of hardcore punk rock. People of this group are called Emo. Emo is used to refer to any form of guitar-driven alternative rock that is particularly or notably emotional.
Emo is used to describe a young person who is over-emotional or stereotypically Emo. The young person makes a public display of his emotions and often faces ridicule and mockery for the same. Emotions are private and should be kept within oneself. Emotions should not be shared with everyone because no one will ever understand your journey and what you are going through.