slam the brakes on

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.
See also: brake, on, slam
References in periodicals archive ?
Then they all pull out again, do 60+, next sign, slam the brakes on and same again and again.
We want to slam the brakes on insurance fraud in California that costs consumers and companies millions of dollars annually,'' District Attorney Steve Cooley said in a statement.
That means government should slam the brakes on budget expansion until leaders give the public very clear, detailed explanations of exactly what is to be accomplished with the dollars, who will be held accountable, and how and when the public will be able to measure a program's success (or failure) with reasonable clarity.