A speaker (or fan) of Lojban language. Term coined by Mark Shoulson. Face it, it's a more amusing term than Lojbanist.
Possibly from Esperanto Lojxbanano?
No, not when I coined it. I think I was reacting to the flap about lojbani sounding too eastern, and thought it was a funny-sounding name. I don't remember thinking Esperanto at the time (but who knows?)
'...or Lojbaneers.'