Before Sam Singleton, before the FSM, before the IPU, there was the original American parody religion…
If you haven’t yet heard of the Church of the Subgenius, well, you’re missing out. They have roots going back to the 1970’s and not a few commonalities with Discordianism. Their Hour of Slack radio show / podcast is on episode #1389 by now, and I’m almost sure that’s a legitimate number, not even adjusted for inflation.