Sierra

Someone who hates you, yet still adds you on facebook. She posts every aspect of her life on facebook that you never wanted to know. When you comment on them, she screams at you and tells you to stop stalking her and stop being a creeper. And to top it all off, she comments on everything you do and expects you to be nice even though her comments suck and are generally mean.

Person 1 "Stop! Don't comment on that picture!
Person 2 "Why not?"
Person 1 "A Sierra posted that."
Person 2 *Gasp!*