Facebook first rights
When a friend adds one of your friends, and you are the only mutual friend between them, everything that your friend does with the other friend must go through you.
Matt: "Erin wants to meet up Friday, is it alright if I hang with her?"
Sam: "No!"
Matt: "Why?"
Sam: "Facebook first rights!"
Matt: "Aw, fuck you!"
Sam: "No!"
Matt: "Why?"
Sam: "Facebook first rights!"
Matt: "Aw, fuck you!"