Archaic British slang meaning to give someone a beating or thrashing. The phrase uses the humorous pretence of 'dusting' a jacket — knocking the dust out of it — as a euphemism for punching and hitting someone. It belongs to the colourful vocabulary of 19th-century slang for physical punishment.
He threatened to dust his jacket if he heard another word about it.
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(slang, archaic) To give someone a beating.
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