Other
- FF, a large brassiere cup size
- FF, an abbreviation of French Franc
- ff. (sing. f.), implies and the following pages, usually as a suffix to a page number in the index of a book
- ff - Südtiroler Wochenmagazin, an Italian weekly journal published in German language
- Fisherman's Friend, a brand of throat lozenges
- Fist Fuck (or "Fist Fucking"), the sexual practice of fisting
- Jensen FF, the first non all-terrain production car equipped with 4WD and an anti-lock braking system
- Ferrari FF, a sports car
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