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brass up

British slang with two distinct lives.

ˈbɹæs ˈʌp132 viewsLast reviewed Jun 29, 2026+ Add a definition
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#1·Apr 28, 2026

British slang with two distinct lives. In civilian use, to brass up means to pay what you owe — settling a debt, handing over money, or coughing up cash you'd rather keep. The phrase has the feel of reluctant obligation, as if the money is being extracted rather than freely given. In military slang it takes a harder turn, meaning to shell or bombard a position with heavy fire — specifically machine-gun or artillery fire laid down with intensity. Context determines which brass up is being delivered.

The landlord knocked twice a week until they finally agreed to brass up the three months of back rent.
Origin: British slang; the 'pay' sense likely derives from 'brass' as informal British English for money; the military sense may relate to 'brass' as a term for ammunition casings. Editorial expansion authored on Slangora (model-assisted, hedged).
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#2·Apr 26, 2026

(slang) To pay a debt or hand over money.

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#3·Apr 26, 2026

(military slang, transitive) To shell.

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