Emo ? Hype up word?

Well its seem to be trend nowadays...wats with the the word emo? Short form for emotion? Well its seem to be the in thing to use the word emo...Well the other day when we went out for yumcha...They are like saying dont be so emo? My question now is emo a good thing or not? In my opinion a person without 'emo' is a cold hearted person...well the same goes for a person with too much 'emo' is like a person going through pms...you dont wan a person to break out or cry at the slightest joke or tease...lol. with that aside am I considered an emo person or who is? Well for your info im not in the category I listed above...I moderate emo person i.e. not like pms person ( sorry fro those is offended)...