| Abbreviation | Definition |
|---|---|
| FTSIO | F*** This S*** I'm Out |
| FTSO | Figure That Stuff Out |
| FTT | Free To Talk |
| FTTB | For The Time Being |
| FTTR | For Those That Remember |
| FTW | F*** The What |
| FTW | Fix The World |
| FTW | Flee The World |
| FTW | For The Win |
| FTY | Faster Than You |
| FU | Formerly Undesirable |
| FUBARBUNDY | F***ed Up Beyond All Repair But Unfortunately Not Dead Yet |
| FUBU | For U By U |
| FUC | Funny / Useful / Cool |
| FUCK | False Use of Common Knowledge |
| FUD | Fear, Uncertainty, and Doubt |
| FUF | Flush Your Face |
| FUN | Fairly Unique Name |
| FUNC | F***ed Up No Chance |
| FUO | Fevers of Unknown Origin |