A fnord is disinformation or irrelevant information intending to misdirect, with the implication of a conspiracy. The word originated in the obscure Principia Discordia, by Kerry Thornley and and Greg Hill, but it was popularized by the Illuminatus!
The owner simply wanted people to ask wtf this means is my guess, and he's not even able to define it. He knew it came from a book about Illuminatus though... so, add that up, and you get kook.
Why am I posting it? So you'll never have to ask some kook wth it means.