Meaning of “knock sb's block off” in the English Dictionary

british dictionary

"knock sb's block off" in British English

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knock sb's block off


If you say that you will knock someone's block off, you are threatening to hit them very hard, especially on the head:

I'll knock his block off if he tries anything with me!

(Definition of “knock sb's block off” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)