語源は不明。突然現れる幽霊を表す「bogey」に由来すると考えられることが多い。
One bogus or machine impressing dies on the coin, with a number of dies, engraving tools, bank bill paper, spurious coin, &c. &c. making in all a large wagon load, was taken into possession by the attorney general of Lower Canada. [Niles' Register, Sept. 7, 1833, quoting from Concord, New Hampshire, "Statesman," Aug. 24]Some trace this to tantrabobus, also tantrabogus, a late 18c. colloquial Vermont word for any odd-looking object, in later 19c. use "the devil," which might be connected to tantarabobs, recorded as a Devonshire name for the devil. Others trace it to the same source as bogey (n.1).