jam on the brake(s) | jam the brake(s) on成語所屬單字brakejam on the brake(s) | jam the brake(s) onjam on the brake(s) | jam the brake(s) on — 慣用語慣用語1. To press the brake pedal of a vehicle very hard and quickly.1.慣用語釋義猛踩煞車To press the brake pedal of a vehicle very hard and quickly.例句Maya jammed on the brakes when a dog ran into the street.Did you jam the brakes on when you saw the red light?