Origin of fanny; from uncertain or unknown; perhaps fan,
- Slang The buttocks.
- Chiefly British Vulgar Slang The female genitals.
Origin of fannyPerhaps from Fanny, a nickname for Frances.
- (UK, vulgar) The female genitalia.
- Her dress was so short you could nearly see her fanny
- (North America, informal) The buttocks; arguably the most nearly polite of several euphemisms.
- Children, sit down on your fannies, and eat your lunch.
- Get off your fanny and get back to work!
- (UK, vulgar) Sex; similar to North American pussy
- This club is full of fanny.
- (UK, naval slang) Mess kettle or cooking pot.
The British naval slang sense derives from Fanny Adams. Tins of mutton introduced as rations were not liked by the sailors and were taken by them to contain the butchered remains of Fanny Adams who had been brutally murdered and dismembered. The tins were re-used for eating from and cooking with.