A person who cries on March 22nd, laugh uncontrollably while looking at milk and can't understand any lyrics from Fall Out Boy because shit, we don't understand why Patrick is singing like he got peanut butter in his mouth.
This could also go term by a person who only shops in Hot Topic and wear band merch.
An emo could be seen during daily sacrifices of getting MCR back because GODDAMN WE NEED OUR BOYS BACK, PLEASE GERARD I'M BEGGING YOU.
Person 1: hey... What the fuck are you doing?
Emo: *bloody hands and is drawing a pentagram with The Black Parade album in the middle while some random dude is tied up on a pole close to the pentagram crying because he shall be sacrificed for the sake of the reunion* ... nothing