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1. slang The sun. The phrase comes from rhyming slang in which "currant bun" rhymes with "sun." Primarily heard in UK. Are you enjoying the currant bun now after all that rain? Get out in the currant bun while you can—it'll be setting soon.
2. slang By extension, the tabloid magazine The Sun. Primarily heard in UK. What ridiculousness is the Currant Bun peddling today?
See also: bun
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.