If you do, he really will beat your brains out.

Then they will proceed to try to beat each other's brains out.

"Son, if you weren't needed, I'd beat your brains out with an old phone list."

And these guys are so *smart* they want to beat his brains out.

A few minutes ago she'd been trying to beat the guy's brains out, and now she was worrying about his health.

I'd say they beat his brains out because he was never the same man afterwards.

Why should I beat out my brains on such piffle?

You don't have to beat your brains out over it.

Then, at an order from the king, a tall savage raised a club to beat out his brains.

And then try to beat the other team's brains out in the game.