Meaning of “crack the whip” in the English Dictionary

british dictionary

"crack the whip" in British English

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crack the whip

to use your authority to make someone else behave better or work harder:

We were two months behind schedule, so I decided it was time to crack the whip.

(Definition of “crack the whip” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"crack the whip" in American English

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crack the whip

to act with authority to make someone work harder:

I'm going to have to crack the whip to get these kids to study more before finals.

(Definition of “crack the whip” from the Cambridge Academic Content Dictionary © Cambridge University Press)