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English definition of “put your foot down”

put your foot down

C2 to use your authority to stop something happening : When she started borrowing my clothes without asking , I had to put my foot down.Assertions and asserting UK (US floor it) to increase your speed when you are driving : The road ahead was clear , so I put my foot down.Driving and operating road vehiclesIncreasing and decreasing speed of motionMoving quickly
(Definition of put your foot down from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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