the brains of the/this/that operation

the brains of the/this/that operation

The primary organizer of something. I doubt Jim and John had anything to do with the break-in. I bet you Tyler was the brains of the operation—those boys are just his toadies. You think it's a terrible idea? Well, who's the brains of this operation, you or I?
See also: brain, of, operation, that, this
Farlex Dictionary of Idioms.
See also:
  • the brains of the/this/that outfit
  • brains
  • bet on
  • bet on (someone or something)
  • bet on it
  • a long shot
  • long shot
  • long shot, (not by) a
  • long shot, a
  • crush out of