Discordianism

Discordianism /dis-kor'di-*n-ism/ n.  The veneration of
   {Eris}, a.k.a. Discordia; widely popular among hackers.
   Discordianism was popularized by Robert Shea and Robert Anton
   Wilson's novel "{Illuminatus!}" as a sort of
   self-subverting Dada-Zen for Westerners -- it should on no account
   be taken seriously but is far more serious than most jokes.
   Consider, for example, the Fifth Commandment of the Pentabarf, from
   "Principia Discordia": "A Discordian is Prohibited of
   Believing What he Reads."  Discordianism is usually connected with
   an elaborate conspiracy theory/joke involving millennia-long
   warfare between the anarcho-surrealist partisans of Eris and a
   malevolent, authoritarian secret society called the Illuminati.
   See {Religion} in Appendix B, {Church of the
   SubGenius}, and {ha ha only serious}.