The idiom "bright spark" is believed to have originated in British English. The phrase likely emerged from the imagery of a spark representing intelligence or brilliance, combined with the adjective "bright" to emphasize the person's intellectual abilities. It is a metaphorical expression that conveys the idea of someone shining intellectually or having a quick, sharp mind. Over time, the phrase has become a commonly used idiom to commend or recognize someone's intelligence or cleverness.

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