Useless printed material, advertisements, or paperwork; junk mail or bureaucratic documents of little value.
British slang, likely derived from 'bum' (worthless) or possibly from 'bum fodder' (an old term for toilet paper made from waste paper). Common in 20th-century British English.
Bumf is pure British bureaucratic frustration captured in one word—offices in the UK still use it to describe the endless reams of useless paperwork that accumulate, making it one of the most satisfying complaint words in English.
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