Useless printed material, paperwork, or documents; worthless printed matter or rubbish.
British slang, possibly from 'bum' (worthless) or imitative origin. Also spelled 'bumf', entered British English in the 19th-20th centuries.
Before 'spam' existed, Brits called junk mail and useless pamphlets 'bumph'—the word itself sounds dismissive, like you're spitting it out.
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