| Abbreviation | Definition |
|---|---|
| FIE | Fly-In Echelon |
| FIF | Free Iraq Force |
| FIF | Free Iraqi Forces |
| FIFO | Fall In, Fall Out |
| FIFO | First-in first-out |
| FIFV | Future Infantry Fighting Vehicle |
| FIGA | Federacion Iberica de Grupos Anarquistas |
| FIGHT | Finding Inside Guts To Honor Tenacity |
| FIGMO | F__K It I Got My Orders |
| FIGMO | Forget It, I Got My Orders |
| FIGN | Forces d’Intervention de la Gendarmerie Nationale |
| FIGN | Forces dIntervention de la Gendarmerie Nationale |
| FIJFI | F__k It, Just F__k It |
| FIM | Facing Identification Marks |
| FIM | Field Inspection Manual |
| FIM-92 | Stinger Missile |
| FIM-92 | tinger Missile |
| FIMI | Fellow of the Institute of Military Intelligence |
| FIMT | Forces in Mind Trust |
| FINEX | FINal EXercise |