A girl who likes Emo/Indie music, or basically anything obscure. Some cut, some don't. Some are sad a lot, some aren't. They usually have short hair that has been dyed in the past or is dyed now. She shops at thrift stores primarily, but doesn't mind getting something brand-new every once in a while. There's no set-in-stone definition of an Emo girl, because one Emo girl doesn't act exactly the same as the next.
Emo can mean a lot of things. Emo girls can *be* a lot of things.