knock block off

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knock someone's block off

Sl. to hit someone hard in the head. Wilbur almost knocked Tom's block off by accident. He threatened to knock my block off if I didn't do as I was told.
See also: block, knock, off

knock somebody's block off

if you say you will knock someone's block off, you mean you will hit them very hard Say that again and I'll knock your block off!
See also: block, knock, off