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1. noun, vulgar slang A sudden expulsion of air from the vagina, often resembling the sound of flatulence. "Fanny" is a vulgar slang term for the vagina. Primarily heard in UK.
2. verb, vulgar slang To expel air out of the vagina in a manner resembling flatulence. Primarily heard in UK.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.