A total bitch who comes along hogging your best friend and is really annoying. Your friend likes them but you despise of them. They act like they are all innocent but you know that they are evil deep down.
A person on facebook who goes to ALL your friends and befriends them. You notice this when suddenly he or she has 36 friends in common and you don't even know the person!
I noticed that Matthew stole all my buds on facebook what a facebook friend stealer and asshole.
Someone, usually of the other sex, that spends a lot of time with one of your friends, hogging them away from you. Friend stealers usually become that person's boyfriend or girlfriend.
Dude 1: "Dude, how come he's not hanging out with us anymore? I've been calling him up all week!"
Dude 2: "He's with that new chick dude, they hang out like every day son!"
Dude 1: "That no good friend stealer!"
When one approaches one's friends that he only knows through that individual and attempts to impress them so that those friends prefer the company of the stated "friendstealer" to the friends.
Eugene has a life, so Max tried to friendsteal him.
Yeah, if this keeps going on, he might friendsteal just to stay out of it.