| Abbreviation | Definition |
|---|---|
| FIMO | Forget It, Move On |
| FINALS | F**k, I Never Actually Learned S**t |
| FIO | Figure It Out |
| FIOS | Figure It Out s***head |
| FIQ | Frequently Ignored Questions |
| FIS | Fake Information System |
| FISH | F*** It S*** Happens |
| FISH | F*ck It Sh*t Happens |
| FISH | Find It Some How |
| FISH | For Immediate Sympathetic Help |
| FIT | Fashion Institute Of Technology |
| FITB | Fill In The Blank |
| FITB | ill In The Blank |
| FIY | Fly It Yourself |
| FIY | Fly It Yourself |
| FKIN | F*cking |
| FKNG | F*cking |
| FL | Fake Love |
| FL | Freakin Loser |
| FL | Friggin Loser |