The idiom "leave a sour taste in one's mouth" is a figurative expression originating from the physical sensation of tasting something unpleasant or bitter, which may linger and affect one's overall experience. In a metaphorical sense, it is used to signify a negative impression or experience that lingers in a person's memory, leaving them with discomfort or displeasure.

What is the origin of the idiom "leave a sour taste in one's mouth" and when to use it?

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to [leave] a (sour|bad) taste in {one's} [mouth]

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Definición y significado de "leave a sour taste in one's mouth "en inglés

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