Someone who is very popular online but when not on the computer has or has close to no friends. A prime example are Myspace whores, WoW nerds, and online predators. You would never be able to pick these people from a lineup, but you know their a/s/l, screename, and you know their face....from a picture.
That kid Joe sits alone in school but i heard he has like 50,000 friends on myspace, hes a cy-lebrity.
Tom from myspace is a prime example.