| F2F | Face-to-Face |
| FAB | Features Attributes Benefits |
| FAH | F***ing A Hot |
| FAP | F***ing A Pissed |
| FAQL | Frequently Asked Questions List |
| FAQOMFT | Frequently Argued Waste Of My F***ing Time |
| FASB | Fast Ass Son Bitchii |
| FAWC | For Anyone Who Cares |
| FB | F*** Buddy |
| FBI | F***ing Brilliant Idea -or- Female Body Inspector |
| FBKS | Failure Between Keyboard and Seat |
| FDGB | Fall Down Go Boom |
| FE | Fatal Error |
| FF | Friends Forever |
| FF&PN | Fresh Fields and Pastures New |
| FFS | For F***s Sake |
| FGDAI | Fuhgedaboudit -or- Forget About It |
| FIF | F*** I'm Funny |
| FIIK | F*** If I Know |
| FIL | Father-In-Law |
| FILF | Father I'd Like to F*** |
| FILTH | Failed In London, Try Hong Kong |
| FINE | F***ed up, Insecure, Neurotic, Emotional |
| FISH | First in, Still Here |
| FITB | Fill In The Blanks |
| FLA | Four Letter Acronym |
| FMLTWIA | F*** Me Like The Whore I Am |
| FMTYEWTK | Far More Than You Ever Wanted To Know |
| FMUTA | F*** Me Up The Ass |
| FO | F*** Off |
| FOAD | F*** Off And Die |
| FOAF | Friend Of A Friend |
| FOC | Free of Charge |
| FOFL | Falling on Floor Laughing |
| FOL | Fond of Leather |
| FOMCL | Falling Off My Chair Laughing |
| FORD | Found On Road Dead -or- Fixed Or Repaired Daily -or- F***ed Over Rebuilt Dodge |
| FRED | F***ing Ridiculous Electronic Device |
| FSR | For Some Reason |
| FSU | F*** Sh** Up |
| FTASB | Faster Than A Speeding Bullet |
| FTBOMH | From The Bottom Of My Heart |
| FTF | F*** That's Funny |
| FTFOI | For The Fun Of It -or- For The F*** Of It |
| FTL | Faster Than Light |
| FTLOG | For The Love Of God |
| FTN | F*** That Noise |
| FTR | For The Record |
| FTRF | F*** That's Really Funny |
| FTTB | For The Time Being |
| FTW | For The Win -or- F*** The World |
| FU2 | F*** You Too |
| FUBAR | F***ed Up Beyond All Recognition |
| FUBB | F***ed Up Beyond Belief |
| FUD | Fear, Uncertainty, and Disinformation |
| FUJIMO | F*** You Jack I'm Movin' On |
| FUM | F***ed Up Mess |
| FWB | Friends With Benefits |
| FWD | Forward |
| FWIW | For What It's Worth |
| FYA | For Your Amusement |
| FYE | For Your Edification |
| FYF | From your Friend |
| FYI | For Your Information |
| FYIFV | F*** You I'm Fully Vested |
| FYLTGE | From Your Lips To Gods Ears |
| FYM | For Your Misinformation |
| FYSBIGTBABN | Fasten Your SeatBelts It's Going To Be A Bumpy Night |
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