What does cockamamy mean?
Cockamamy (also commonly spelled cockamamie) is an informal American adjective meaning ridiculous, nonsensical, or implausible. It is typically applied to plans, ideas, explanations, or stories that strike the speaker as silly, half-baked, or wildly improbable: a cockamamy excuse for missing work, a cockamamy get-rich-quick scheme. The word carries a mildly dismissive tone, though it often suggests amused skepticism rather than harsh condemnation — calling an idea cockamamy implies it deserves to be laughed off more than seriously attacked. Its origin is genuinely obscure; a widely repeated theory derives it from decalcomania, the craze for decorative picture transfers, supposedly garbled by children or street sellers, but this has never been firmly proven. The word appeared in American usage around the mid-twentieth century and remains a colorful, colloquial way to signal that something simply does not make sense. It is best reserved for casual conversation and informal writing.
adjectiveRidiculous, nonsensical, or implausible; lacking seriousness or sense. Used chiefly in informal American English to describe ideas, schemes, or stories that are silly or far-fetched.
- (of an idea, plan, story, or object) ridiculous, nonsensical, or implausible; absurdly contrived
"He came up with some cockamamy scheme to pay off his debts by selling handmade candles."
"She dismissed the whole business plan as a cockamamy idea that would never survive its first investor meeting."
"The movie's plot was so cockamamy that critics couldn't decide whether to laugh at it or praise its inventiveness."
Nobody is quite sure where this delightfully silly word comes from — one leading theory traces it to 19th-century New York street kids mangling the French word for a decal.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cockamamy
Cockamamy emerged in American English in the early twentieth century, with its spelling variants including cockamamie and cock-eyed-influenced forms appearing alongside it. Its ultimate origin is uncertain, but the most commonly cited theory links it to 'decalcomania', the nineteenth-century craze for transferring printed designs onto surfaces, possibly via garbled use by children or street vendors. No secure cognates are known, and dictionaries generally label the etymology as obscure or disputed.
Usage notes
Informal and colloquial, chiefly American; often spelled 'cockamamie'. Carries a mildly dismissive, sometimes affectionately mocking connotation rather than harsh criticism. Rare in formal writing.
Don't confuse with
Decalcomania is the art or hobby of transferring pictures from specially prepared paper onto surfaces; one proposed but unproven origin of 'cockamamy' is a garbled form of it, and the two words share nothing in meaning.