bright spark

noun

Definition of bright spark

British, informal + disapproving
: a person who says or does something that seems intelligent but is really not Who's the bright spark who came up with this rotten idea?

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“Bright spark.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bright%20spark. Accessed 27 May. 2020.

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