Emo

Emo is a genre of music, a type of pop-punk music, but with a softer, more mainstream and guitar-based sound. It is NOT a type of person/style, as more commonly thought. "Emo" people can be classified under "scene", which is basically the same thing.

Friend #1: "Did you hear My Chemical Romance broke up??!!"
Friend #2: "OMG, yes! I was so depressed when I found out... they were my favourite emo band."
Friend #1: "I know... I thought you should know." *frowns* "Have you heard of All-Time-Low? They're a pop-punk band, kinda like My Chemical Romance."
Friend #2: "Yeah, I've heard of them. Thanks ____!"