That douchebag that keeps commenting on your and your friends' statuses and keeps joining wall conversations when clearly not wanted around. Hardly anyone ever responds to any of his posts, ever, regardless of whether he directly asks someone a question through a comment. Usually also an annoying jackass that keeps hanging around you and your friends in real life and doesn't pick up the countless hints that no one likes him. The only reason why people ever accepted his friend requests was to not look like a jerk. Very similar to a facebook obligate friend.
Mike: Lost a bet to Steve
Mark: damn that sucks how much do you owe him
Mike: $15 :(
Matt: HAHA NOOB PWND
Mike *thinking*: god damn it, it's that freakin' facebook jackass again