| Abbreviation | Definition |
|---|---|
| FUBU | Fat United Brothers Undivided |
| FUBU | Fouled Up Beyond Understanding |
| FUBU | Fouled Up Beyond Use |
| FUBU | Fouled Up By User |
| FUCK | Farming University of Central Kentucky |
| FUCK | Fishing Under Cheese Kills |
| FUCK | Fordham University College of Kinetics |
| Fuck | Fornication Under Crown Knowledge |
| FUCK | Fried Underwear Can Kill |
| FUCK | Friend U Can Keep |
| FUCK | Friendly Ugandian Crusty Knights |
| FUCK | Friendship U Can Keep |
| FUCK | Funny Urban Cowboy Knife |
| FUCK | Furry Umbrellas Catching Kangaroos |
| FUD | Fear, Uncertainty, and Doubt |
| FUD | Food Under Destruction |
| FUD | Frequently Usually Delightful |
| FUDGE | Fouled Up Data Goobers Everyone |
| FUKIT | Former United Kingdom Including Territories |
| FUMTU | Fouled Up More Than Usual |