Counterfeit or phony; perhaps not genuine: bogus money; bogus jobs.
Counterfeit or artificial; perhaps not real.
unwanted or harmful.
wrong, worthless, or damaged.
Of a completely fictitious problem imprinted for collectors, frequently issued for a non-existent territory or nation (not to ever be mistaken for forgery, which can be an illegitimate backup of a genuine stamp).
centered on false or misleading information or unjustified assumptions.
Spurious; fictitious; sham; -- a cant term originally placed on counterfeit coin, and therefore denoting such a thing fake.