Definition of brainbox in English:

brainbox

Line breaks: brain|box
Pronunciation: /ˈbreɪnbɒks
 
/

noun

British informal
A very clever person.
More example sentences
  • And he discovered that whizzkids in IT may be brainboxes when it comes to mastering the microchip, but too many are locked in a world of jargon seemingly too lofty for ordinary mortals to understand.
  • Calling all armchair brainboxes - think you're a real fact-master?
  • We've got the brainboxes but we are less establishment, too, and that's a source of pride.

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Pronunciation: ˌōlēˈajənəs
adjective
rich in, covered with, or producing oil; oily