Ask not what IS discordianism, but what ISN'T discordianism.
A religion disguised as a joke disguised as a religion, founded by Malaclypse the Younger (or Mal-2, commonly thought to be an alias of Greg Hill) and Lord Omar Khayyam Ravenhurst (probably Kerry Thornley). Discordians supposedly worship the goddess Eris (or Discordia), but the central theme of Discordianism is a combination of absurdity and philosophy.
Discordians tend to be fun-loving--if eccentric--folks, and great fun to have a few drinks with.
For more information on Discordianism, consult your pineal gland. Or Google it, whatever.
Well, you're the pope. YOU decide!
"Discordianism is but one of many, and several of some. It can also be described as five tons of flax."
The practice of not practicing anything unless it is discordianism. If that isn't it than it is something else unless it isn't in whic case it is not. To practice discordianism is to destroy it's existence unless you practice discordianism in which case you would not practice discordianism unless you were or you weren't.
Discordianism is everything. Unless it isn't.