slam the brake(s) on(redirected from slammed the brake on)
slam the brake(s) on
1. Literally, to quickly step on a vehicles brakes to slow down or stop. He slammed on the brakes when he saw the child running into the street. You risk doing your car serious damage if you slam the brake on without shifting down the gears.
2. By extension, to slow down or stop something one is doing. In this usage, the thing being stopped comes after "on." We had to slam the brakes on development when we found out the investors were pulling out.
slam the brakes on
to push on a vehicle's brakes suddenly and hard. (The can be replaced by a possessive pronoun.) The driver in front of me slammed her brakes on and I nearly ran into her. Don't slam on your brakes when the road is wet.