"Emo" stands for Emotional Hardcore. It is definitely NOT ARSS music.

Well, Ruth, you probably know more about this than I do, although regional/national differences may have something to do with it. I have only heard the term in reference to self-indulgent singing of "original compositions" in a mostly-ascoustic coffeehouse setting, in New Orelans, LA, USA. To my mind, the term seemed to denote music aspiring to "ARSS" status and falling short.