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Proof-creeping occurs when one receives a friend request but before accepting, you view your profile to make sure there is nothing that would offend the potential friend before they creep your profile. Much like proofreading a document before submitting it to a professor or giving a presentation.
Matt: When I get friend requests on Facebook, I creep my page to see what they'll be creeping.

Andrew: Wouldn't that be proof-creeping?
by Captain Cleedus August 17, 2011