J. Random

J. Random /J rand'm/ n.  [generalized from {J. Random
   Hacker}] Arbitrary; ordinary; any one; any old.  `J. Random' is
   often prefixed to a noun to make a name out of it.  It means
   roughly `some particular' or `any specific one'.  "Would you
   let J. Random Loser marry your daughter?"  The most common uses
   are `J. Random Hacker', `J. Random Loser', and `J. Random Nerd'
   ("Should J. Random Loser be allowed to {gun} down other
   people?"), but it can be used simply as an elaborate version of
   {random} in any sense.