Bogus
late 18th century (originally US, denoting a machine for making counterfeit money): of unknown origin.
wiktionary
First attested as an underworld term for counterfeit coins. Later, the word was applied to anything of poor quality. The newest use to mean useless is probably from the slang of computer hackers.
The origin is unknown, but there are at least two theories that try to trace its origin:
etymonline
bogus (adj.)
"counterfeit, spurious, sham," 1839, from noun (1838) meaning "counterfeit money, spurious coin," American English slang, apparently from a word applied (according to OED first in Ohio in 1827) to a counterfeiter's apparatus.
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 the Concord, New Hampshire, Statesman of 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). Related: Bogusly; bogusness.
