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

See also:

the brains of the/this/that outfit
brains
a long shot
bet one's bottom dollar, one can
leave no tracks
bet (one's) life on (something)
bet bottom dollar
bet (one's) bottom dollar
bet your bottom dollar
bet your bottom dollar/your life

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