Definition:
A "hand brake" is a type of brake in a vehicle that you operate with your hand, rather than your foot. It is used to keep the vehicle from moving when it is parked or to help slow down the vehicle in certain situations. Usually, it works through a mechanical system that connects it to the brakes of the car.
Though "hand brake" does not have specific idioms or phrasal verbs associated with it, you might use phrases like: - "Put the brakes on something": This means to stop or slow down progress on a project or plan.
The "hand brake" is an essential safety feature in vehicles, used primarily for parking and in emergencies.