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1.
When someone you vaguely know or hate sends you a facebook friend request and you don't wish to appear rude or unsociable by ignoring or rejecting the request.

This sometimes happens when you add a new boy or girl friend and their friend who you spoke to briefly at a party sends you a request. The requester knows that you'll be all over facebook informing your friends about your new romance.
You: That bitch Alice sent me a friend request
Bob: oh I don't see we have her as a mutual friend
You: I felt facebook friend threat so I'm just going to ignore it
by eneville July 26, 2010