What does bogus mean?
Bogus is an adjective describing something that is not what it pretends to be — a fake, a fraud, or a counterfeit. A bogus passport, bogus charity, or bogus invoice is one that appears legitimate but is false or deceptive, usually with intent to cheat. The word carries a connotation of deliberate dishonesty rather than innocent error, though in casual speech it has broadened to mean anything absurd, unfair, or plainly wrong: "that's a bogus rule." The term originated in nineteenth-century America, where it was used as a noun for counterfeit money, before settling into its modern adjectival use in both British and American English. Its etymology remains genuinely obscure, which makes it one of the more intriguing entries in dictionaries of slang origins. Useful because it compresses the idea of deceptive falseness into two syllables, it pairs naturally with nouns like claim, excuse, check, and ID.
adjectiveNot genuine; fake or counterfeit, especially in a way intended to deceive. It also describes anything absurdly wrong, irrational, or worthless.
- Counterfeit or not what it claims to be; deliberately faked.
- Absurd, irrational, or contemptibly wrong (informal).
"The auditor quickly spotted the bogus invoices filed by the shell company."
"He was arrested for passing bogus twenty-dollar bills at three different stores."
"That's a totally bogus argument — the data doesn't support your conclusion at all."
"Bogus" began life as American frontier slang for counterfeit coins — and its true origin is still a mystery linguists can't fully crack.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of bogus
Bogus first appeared in American English in the early nineteenth century, initially as a noun denoting counterfeit money or a machine for making it. Its further origin is uncertain and disputed; suggested connections to other words have never been firmly established, so dictionaries generally label it "origin unknown." From its counterfeiting sense it developed into the general adjective meaning fake or spurious that is standard today in both British and American usage.
Related word forms
How bogus is actually used
Informal to neutral register; common in journalism and everyday speech but less suited to formal legal writing, where "fraudulent" or "fictitious" is preferred. The extended sense meaning simply "wrong or ridiculous" is chiefly informal and more common in American English.
Easily confused with bogus
Hocus-pocus means meaningless talk or trickery in general, while bogus specifically labels a thing as fake or counterfeit.