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English definition of “jam on the brakes”

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jam on the brakes

to use the brakes of a road vehicle suddenly and forcefully: A motorbike appeared from nowhere and I had to jam on the brakes.
Translations of “jam on the brakes”
in Chinese (Traditional) 猛然地煞車…
in Chinese (Simplified) 猛地刹车…
(Definition of jam on the brakes from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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