| Abbreviation | Definition |
|---|---|
| FITD | Fight In The Dog |
| FITN | Fish In The Net |
| FITT | Fully Immersive Team Training |
| FIVB | Fédération Internationale de Volleyball |
| FJ | Field Judge |
| FJAA | Fostoria Junior Athletic Association |
| FK | Forward Kick |
| FKTC | Federasiwn Karate Traddodiadol Cymru (Welsh Traditional Karate Federation) |
| FLA | Florida Marlins |
| FLBA | Forest Lake Baseball Association |
| FLBS | Finger Lakes Board Sports |
| FLD | Field |
| FLL | Fantasy Lacrosse League |
| FLO | Football Liaison Officer |
| FLOT | First Leg Of The .... |
| FLOW | Fishing Ladies Outdoor Weekend |
| FLS | Funny Little Stance |
| FLTC | Fitzwilliam Lawn Tennis Club |
| FM | Flyball Master |
| FMA | Filipino Martial Arts |