AFK

   [MUD]  Abbrev.  for  "Away From Keyboard". Used to notify others that
   you  will  be  momentarily unavailable online. eg. "Let's not go kill
   that  frost  giant yet, I need to go AFK to make a phone call". Often
   MUDs  will  have  a command to politely inform others of your absence
   when  they  try to talk with you. The term is not restricted to MUDs,
   however,  and  has become common in many chat situations, from IRC to
   Unix talk.

[glossary]