come a cropper

Possibly from the phrase neck and crop, in which crop may refer to the backside of a horse.

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come a cropper (third-person singular simple present comes a cropper, present participle coming a cropper, simple past came a cropper, past participle come a cropper)

1. (originally) To fall headlong from a horse.
2. (Britain, idiomatic) To suffer some accident or misfortune; to fail.

   She came a cropper on the stairs and broke her leg.

   • 1879, Anthony Trollope, chapter 67, in The Duke's Children:

     I should feel certain that I should come a cropper, but still I'd try it. As you say, a fellow should try.

   • 1922, Katherine Mansfield, At The Bay‎:

     You couldn't help feeling he'd be caught out one day, and then what an almighty cropper he'd come!

   • 1953, Mervyn Peake, Mr Pye, William Heinemann:

     You tried to convey too much and you conveyed nothing. You came a cropper, major.

   • 2022 May 14, “Tech bubbles are bursting all over the place”, in The Economist‎, →ISSN:

     Although they were meant to reach the Moon no matter what, cryptocurrencies are also coming a cropper.

• go a cropper

• neck and crop

• Michael Quinion (2004), “Come a cropper”, in Ballyhoo, Buckaroo, and Spuds: Ingenious Tales of Words and Their Origins, Washington, D.C.: Smithsonian Books in association with Penguin Books, →ISBN.