Hide the Ball Bearings

A business consulting insider term that indicates purposefully hiding the truth by omitting an essential detail. Often used to buy time for negotiations or deeper research.

It's funny because the word ball is in it.

"You didn't bother telling Ewan you're already seeing someone?"
"Nah, I'm going to hide the ball bearings. What if Ewan's got a bigger dick? Gotta do the research before I close the deal."