2. Interjection. ''(Discordianism)'' A word (which may or may not be "fnord" itself) commonly held to be invisible to the conscious mind, but subliminally causing a sense of unease or sudden anger when encountered. So used in the Illuminatus! trilogy. ¹
3. Interjection. ''(Discordianism)'' A word defined as having no definition. ¹
¹ Source: wiktionary.com