Scenmo is a adjective describing kids (usually girls) who are emo (cut themselves, are depressed, etc) but dress and look scene (colored hair, ultra straight, eyeliner, bows, etc). However what seperates them from other sub catagories of emo kids is that they will always deny being anything other then "themselves."
Kid A: Hey, just wondering, are you scene or emo or something?
Kid B: Oh my god no Im just myself- I like to express myself and act and dress how I feel without being labeled. Labels are for soup cans not people!
Kid A: Oh so you're emo-scene soup?
Kid B: Fuck you I'm going to go listen to sad music and edit pictures that I can post on facebook!
Kid A: what a fucking scenmo.