| Abbreviation | Definition |
|---|---|
| MESS | Mike's Electronic Support System |
| MET | My Ego Trouble |
| METS | Mariano Ended Their Season |
| METS | More Expectations Than Success |
| METS | My Entire Team Stinks |
| METS | My Entire Team's Stoned |
| MF | Mistaken Female |
| MF | Mr Fortunate |
| MFC | Microsoft Foundation Classics |
| MFC | Microsoft Frustration Classes |
| MFIPOM | My Family Is Proud Of Me |
| MFJ | Makes Faulty Junk |
| MFL | Money For Life |
| MFN | Moronic Filename Normalizer |
| MFS | Mighty Fine Shaft |
| MFT | Middle Finger Technology |
| MFWSJ | My Fifth Wheel Has Jaws of Steel |
| MG | Marketing Guru |
| MG | Money Guzzler |
| MG | Mort's Great |