[from the Illuminatus Trilogy]
1. A word used in email and news postings to tag utterances as surrealist mind-play or humor, esp. in connection with Discordianism and elaborate conspiracy theories. “I heard that David Koresh is sharing an apartment in Argentina with Hitler. (Fnord.)” “Where can I fnord get the Principia Discordia from?”
2. A metasyntactic variable, commonly used by hackers with ties to Discordianism or the Church of the SubGenius.