Meaning of “knock sth on the head” in the English Dictionary

british dictionary

"knock sth on the head" in British English

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knock sth on the head

UK informal

to prevent something from happening, or to finally finish something:

It's nearly done - another couple of hours should knock it on the head.

(Definition of “knock sth on the head” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

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