| Abbreviation | Definition |
|---|---|
| FIAT | First In All Tests |
| FIAT | Fits In A Thimble |
| FIAT | Fix It Again Ted |
| FIAT | Fix It Again Tomorrow |
| FIAT | Fix It Again Tony |
| FIAT | Fix It All the Time |
| FIAT | Flats In All Tires |
| FIAT | Found In A Tip |
| FIAT | Found In A Trench |
| FIAT | Frenzied Italian At Traffic-lights |
| FIAT | Frenzied Italians At Traffic |
| FIB | Friendly Illinois Buddy |
| FIC | Fanfiction In The Context |
| FICA | Federal Insurance Constrictions Authority |
| FICA | Friends In Congress Always |
| FICA | Funds I Can't Apprehend |
| FID | Finger In Dike |
| FID | Frighteningly Intelligent Demigods |
| FIDS | Freeway Interchange Deficiency Study |
| FIDS | Freeway Interchange Deficiency Study Also in reference to certain plant life known only to florists: |