The Free On-line Dictionary of Computing (30 December 2018):

AIDX

    /aydkz/ A derogatory term for
   IBM's perverted version of Unix, AIX, especially for the
   AIX 3.? used in the IBM RS/6000 series (some hackers think
   it is funnier just to pronounce "AIX" as "aches").  A victim
   of the dreaded "hybridism" disease, this attempt to combine
   the two main currents of the Unix stream (BSD and USG
   Unix) became a monstrosity to haunt system administrators'
   dreams.  For example, if new accounts are created while many
   users are logged on, the load average jumps quickly over 20
   due to silly implementation of the user databases.

   For a quite similar disease, compare HP-SUX.  Also, compare
   Macintrash Nominal Semidestructor, Open DeathTrap,
   ScumOS, sun-stools.

   [Jargon File]

   (1995-04-13)