The act of posting on an acquaintance's wall after seeing them go idle in your friend list in order to bait them into getting back online. Usually targeted at women with whom the FaceBaiter is only loosely acquainted with the ultimate goal of starting a chat conversation without the appearance of trying.
Person: You talk to that girl from the party last weekend?
FaceBaiter: I was just about to but then she went offline. That bitch is never on!
Person: Dude, try FaceBaiting her. Tag her in a picture then you can mack all over that bitch when she gets back on. Get some!