| Abbreviation | Definition |
|---|---|
| FBM | Fat Bald Man |
| FBMG | Facebook Message |
| FBNRL | Funny But Not Really Laughing |
| FBNRL | Funny but not really laughing. |
| FBU | F*** Britain Up |
| FBY | F*** Buddy |
| FBY | Find the Best in You |
| FC | Face Contact |
| FC | Fake Course |
| FC | Fat Chance |
| FC | Fingers Crossed |
| FCE | Favorite Couple Ever |
| FCOL | For Crying Out Loud |
| FCW | Friends of Chatham Waterways |
| FD | First Date |
| FD | Forum Discussion |
| FDAU | Face Down A** Up |
| FDI | Finally Did It |
| FDL | Fat, Dumb, and Lazy |
| FDL | Full Dress Rehearsal |