| Abbreviation | Definition |
|---|---|
| NFL | National Football Lost-forever |
| NFL | National Forensics League |
| NFL | Need For League |
| NFL | Never Found a Life |
| NFL | New Football League |
| NFL | Nitwits Felons & Liars |
| NFL | No Fan Love |
| NFL | No Fan Loyalty |
| NFL | No Friggin Life |
| NFL | No Frigging Loyalty |
| NFL | No Frisky Ladies |
| NFL | No Fun League |
| NFL | Not Fair Love |
| NFL | Not For the Light |
| NFL | Nothing For Losers |
| NFL | Numbskull Failing Losers |
| NFL | Nuts, Flakes, and Losers |
| NFNT | Not Free, No Talk |
| NFS | Network Failure System |
| NFS | No File Security |