(slang) A checking or restraining element.
Origin of Kibosh
From the Irish caidhp bháis, meaning death cap (the hood put on someone before they were hanged to death, or the "Black cap" worn by English judges when pronouncing the death sentence).
From the Scots kye booties, meaning cow boots (the hobble put on cattle to prevent them from straying).
From American Heritage Dictionary of the English Language, 5th Edition
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