Definition of bright spark in English:

bright spark

noun

British
ironic, informal
  • A clever or witty person.

    ‘some bright spark in the agency came up with the idea of rippling silk with a cut in it’
    • ‘What a pity the bright sparks who made Kind Hearts and Coronets are all dead!’
    • ‘We'll never even find out who the bright spark was who made this terrific decision.’
    • ‘Also this week, some bright sparks in the auto industry suggested it would be useful to network our cars.’
    • ‘But you may ask - or some bright spark of a child may ask for you - why?’
    • ‘There are many bright sparks out there, and l trust they are not put off by your ramblings.’
    intelligent person, learned person, highbrow, academic, bookworm, bookish person, man of letters, woman of letters, bluestocking, thinker, brain, scholar, sage
    View synonyms

Origin

From spark.