To pay an excessively high price for something, much more than it's worth or than is reasonable.
This phrase likely originates from the 9th-century Danish occupation of Ireland, where the Danes imposed a punitive 'nose tax' on the Irish. Those who couldn't pay had their noses slit, making it literally costly to avoid paying 'through the nose.'
The grotesque historical origin makes this one of the most viscerally memorable pricing idioms in English. It's remarkable how a medieval punishment evolved into a common expression about overpricing, showing how historical trauma can become linguistic metaphor.
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