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fanny

American  
[fan-ee] / ˈfæn i /

noun

Informal.

plural

fannies

  1. the buttocks.

fanny British  
/ ˈfænɪ /

noun

  1. taboo the female genitals

  2. the buttocks

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Usage

Despite the theory that this word derives from the name `Fanny', its use in British English is still considered taboo by many people, and is likely to cause offence. In the US the word refers to the buttocks. Serious misunderstanding may therefore arise when what people in Britain know as a `bumbag' is referred to in the US as a `fanny pack'

Etymology

Origin of fanny

1925–30; of obscure origin; relation, if any, to British fanny “vulva” (vulgar) is unclear

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.