One who excessively adds people as friends on Facebook even if they have little or no association with those people. As a result, it appears that they are more popular than they actually are.
A unpopular person, who will always comment on popular girls statuses, photos, anything on facebook in hope to start a conversation. Because they are unpopular, the popular girls only respond with one word.
Popular Girl: Cant wait for new moon!
Facefag: Oh cool! Who are you going to see it with?
Popular Girl: Nobody.
Facefag: Oh, you gotta go with somebody.
Popular Girl: Go Away.
Someone (mostly people in Anonymous) that seeks fame and the spotlight to feed their pathetic ego and/or fill their empty pockets. A famefag often tells some type of smockery to get that fame. The Dragons Den is one of the most obvious examples of famefags on Twitter.
a feeling of dread or disgust at seeing that two of your Facebook "friends" who have no reason to know one another have become friends with each other on Facebook, likely as the result of online flirting or a sexual encounter.
While looking through my Facebook news feed, I had to facegag when I noticed that my ex was now Facebook friends with the the town slut... who just happens to live in a town 2000 miles away that my ex recently visited.