Refers to an individual, either sex, that follow the "emo" lifestyle, but is usually a girl. This person believes that they are cute, sexy, attractive, etc...but in reality, they are fat, grotesque beings that no one will befriend. This terms may be inter-changed with "goth-a-potamus", "lard-core", "round-edge", both of which refer to the respective cliques which the names imply.
"She's sooo emoo, her Skinny leg jeans are actually wide boot cut Levi's."
"you're such an emoo-cow. Go bleed in your pasture."