| Acronym | Definition |
|---|
| FF | Firefox (open source Mozilla-based browser) |
| FF | Fast Forward |
| FF | Form Feed |
| FF | And the Following Pages |
| FF | Following |
| FF | Final Fantasy (game) |
| FF | Final Fantasy |
| FF | Friends and Family |
| FF | Fan Fiction |
| FF | Fantasy Football |
| FF | Surrender (Internet slang) |
| FF | Fighting Fantasy (gamebook series) |
| FF | Friends Forever |
| FF | Fantastic Four |
| FF | Freiwillige Feuerwehr (German: Voluntary Fire Brigade) |
| FF | Fetish Factory (retailer) |
| FF | Fujifilm |
| FF | Flip-Flop |
| FF | Fast Food |
| FF | Firefighter |
| FF | Ford Fiesta (car) |
| FF | Full Force (Jedi Knight game) |
| FF | Fly Fishing |
| FF | French Fries |
| FF | Foo Fighters (band) |
| FF | Fat Free |
| FF | Family Finance (college course) |
| FF | Free Fall |
| FF | Folios |
| FF | Forfeit |
| FF | Franz Ferdinand (band) |
| FF | First Flight (tail symbol for the 1st Fighter Wing at Langley AFB, VA) |
| FF | Flavor Flav (hip-hip) |
| FF | Fortissimo (music) |
| FF | Football Field |
| FF | Federal Funds |
| FF | Force Field |
| FF | Friendly Fire |
| FF | Form Factor |
| FF | Food Fight |
| FF | Frozen Fury (gaming clan) |
| FF | Free Flight |
| FF | Frequent Flyer |
| FF | Fossil Fuel |
| FF | Freedom Fighter (video game) |
| FF | Free-Floating (Rifle Barrel) |
| FF | Full Frame (photography) |
| FF | First Friday |
| FF | Filozofska Fakulteta (Faculty of Arts; Ljubljana, Slovenia) |
| FF | Fresh Frozen |
| FF | Fully Fashioned (nylon stockings) |
| FF | Final Fight (video game) |
| FF | Fontfont (typeface library) |
| FF | Founding Father (educational slang) |
| FF | Fundamental Frequency |
| FF | Force Feedback (joysticks/wheels for games) |
| FF | Fully Functional |
| FF | Fleet Foxes (band) |
| FF | Freight Forwarder |
| FF | Fear Factory (band) |
| FF | Fixed Frequency |
| FF | False Flag |
| FF | Freedom Force (game) |
| FF | Ford Foundation |
| FF | Fianna Fail (Irish Political Party) |
| FF | Flat File |
| FF | Foundation Fieldbus |
| FF | Ford Field (Detroit, MI, USA) |
| FF | Frosted Flakes (cereal) |
| FF | Free-Flyer |
| FF | Flat Faced (pipe flange) |
| FF | Fortress Forever (game mod) |
| FF | French Franc |
| FF | Food First (est. 1975) |
| FF | Fixed Focus (optics, cameras) |
| FF | Final Fortress (Lineage 2 game) |
| FF | Firefinder |
| FF | Fiat Forum (online car forum) |
| FF | Frame Format |
| FF | First Fit (IEEE) |
| FF | Formula Fed (parenting) |
| FF | Flagrant Foul (basketball) |
| FF | Free Fluid (medicine) |
| FF | Fright Fest |
| FF | Filter Factory |
| FF | Feeding Frenzy (gaming) |
| FF | Forced Fumble (football) |
| FF | Freedom Forum |
| FF | Freak Factory |
| FF | Ford Forums |
| FF | Filefront (gaming website) |
| FF | Firefly Festival (Dover, DE) |
| FF | Flash and Flow |
| FF | Fabric Filter (emission control device for coal fired power plants) |
| FF | Fatal Frame (game) |
| FF | Freedom Front (South Africa) |
| FF | Fitness Friend |
| FF | Frostfell (gaming, Asheron's Call) |
| FF | Final Frontier (gaming) |
| FF | Frontier Force |
| FF | Fuel Flow |
| FF | Frou Frou (band) |
| FF | Fit Factor |
| FF | Family Feud (TV game show) |
| FF | Feed Forward |
| FF | Fonky Family (French rap group) |
| FF | Fear Factor (TV show) |
| FF | Floor Flatness (concrete construction) |
| FF | Findhorn Foundation |
| FF | Forward Flight (remote control aircraft hobby) |
| FF | Fully Furnished |
| FF | First Flowering |
| FF | Foot Fault (bowling) |
| FF | Focus Fire (gaming, Warcraft or Starcraft) |
| FF | Fluid Fantasy (forum) |
| FF | Fill Factor (solar cell parameter) |
| FF | Und Folgende (German: and following) |
| FF | Flippin Funny |
| FF | Freight Forward |
| FF | Front-Engine, Front-Wheel-Drive Layout (motor vehicles) |
| FF | Flight Following |
| FF | Fatal Fury (anime/game) |
| FF | Fuel Fabrication |
| FF | Friendship Force |
| FF | Flame Failure |
| FF | Far Field |
| FF | Fixed Filter (RSVP) |
| FF | Functional Food |
| FF | Full Funding |
| FF | Field Format |
| FF | Fraud Forum (GSM Association) |
| FF | Feeling Fine |
| FF | Federal Facility |
| FF | Fancy Feast (cat food) |
| FF | Fatally Flawed |
| FF | Feet Forward (bike, scooter, motorcycle) |
| FF | Full Forward (Australian football position) |
| FF | Franc Français (French Franc) |
| FF | Faerie Fire (gaming, World of Warcraft) |
| FF | Front-Engine Front-Wheel Drive |
| FF | Fat Finger |
| FF | Frozen Fire (German online-gaming clan) |
| FF | Football's Future (online community) |
| FF | Fashion Freak |
| FF | Financial Friend |
| FF | Full Faced (pipe gasket) |
| FF | Family Fortunes |
| FF | Navy Fast Frigate (US DoD) |
| FF | Fast Flash |
| FF | Fuzz Face (guitar effect pedal) |
| FF | Frostfire (game) |
| FF | Factory Finish |
| FF | Fast Frigate |
| FF | Fein-Fein (German: extra fine) |
| FF | Finish-to-Finish (work-management relationship) |
| FF | Ferguson Formula (Jensen automobile) |
| FF | Fellesforbundet |
| FF | Follow Friday (twitter) |
| FF | Flesh Field (band) |
| FF | Finance Forward |
| FF | Full Floater (truck axle) |
| FF | Fiend Folio (roleplaying games, Dungeons & Dragons) |
| FF | Full-Fed (animal science) |
| FF | Farm Foundation |
| FF | Fiamma Fumana (band) |
| FF | Foot's Forecast (Baltimore, MD) |
| FF | Finished Floor Elevation (architectural/civil drafting) |
| FF | Femto-Farad |
| FF | Fire & Forget |
| FF | Facebook Fanatic (social media) |
| FF | Fridley Factors (Minnesota wiffleball league) |
| FF | Final Frenzy (Lineage 2 game) |
| FF | Finstere Flure (game) |
| FF | Furious Force |
| FF | Flight Ferry |
| FF | Fuel Failure |
| FF | Fallen Footwear (shoe company) |
| FF | Foolish Four (Motley Fool investment strategy) |
| FF | Force Forfeit (online games) |
| FF | Fast Fortress (Age of Empires 3 gaming) |
| FF | Failure Factor |
| FF | Fatal Forces (gaming clan) |
| FF | Fatigue Correction Factor (US DoD) |
| FF | Fuchs Friends (online community) |
| FF | Felles Forbundet (Norwegian labour union) |
| FF | Funfonex (Finnish gaming site) |
| FF | Frango Frito (Portuguese: fried chicken) |
| FF | Freestyle Factory (Sweden; est. 2006) |
| FF | Filters Fast LLC (Monroe, North Carolina) |
| FF | Fraction or Finish |
| FF | Fulton Factor |
| FF | Filii Fabricaverunt (Latin: His/Her Sons Built, epigraphy) |
| FF | Forced Fluids (medical care) |