"Floobydust" is a contemporary term derived from archaic Latin miscellaneus, whose disputed history probably springs from Greek origins (influenced, of course, by Egyptian linguists) -- meaning here "a mixed bag." — National Semiconductor Audio Handbook, 1976 Corporation.
Origin of the term "floobydust"
In the December 23, 2002 issue of Electronic Design, Bob Pease of National Semiconductor answers a reader question concerning the origin of the term floobydust: I think the definition goes ALL THE WAY BACK to— 1975. Not much Greek or Egyptian influence. The guys who coined it were Dennis Bohn and maybe Tim Isbell, and a customer and his daughter; names mercifully forgotten... The "dictionary" on the web tells you this origin of the term was a minibook written by Dennis Bohn. So, we can't stop him from spreading his own definiton and origin story! But it was the name of Chapter 6 in NSC's 1976 Audio-Radio Handbook, and we all agree it means "miscellaneous." —RAP