in cahoots with someone

in cahoots (with someone)

In close, often secretive or conspiratorial cooperation with someone. It turned out that the business tycoon was in cahoots with local law enforcement to have the investigation dropped. We've been in cahoots with a company overseas who can produce the product for half the price.
See also: cahoots
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

in cahoots with someone

If one person is in cahoots another, they are working together secretly to do something, usually something dishonest. He was accused of being in cahoots with the kidnappers. Note: You can also say that two people are in cahoots. They worked in cahoots to set the whole thing up without me knowing.
See also: cahoots, someone
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012
See also:
References in periodicals archive ?
You have to be in Cahoots with someone. I've also never been in Cognito.
Remember, you are in cahoots with someone who will ditch you when you are of no further use to him.