| Abbreviation | Definition |
|---|---|
| MM | Marilyn Manson |
| MM | Marilyn Monroe |
| MM | Marion Montgomery |
| MM | Marshal McLuhan, Canadian scholar |
| MM | Michael Mandel, Economist |
| MM | Mickey Mouse |
| MMS | Mohammad Muzzammil Shah |
| MN | Mackay Neal |
| MN | Mike Nesmith |
| MN | Mr. Nightmare |
| MOM | Marjorie Oludhe Macgoye |
| MOQ | Marquess Of Queensberry |
| MOQ | Mary Our Queen |
| MP | Mehul Patel |
| MP | Michael Pietsch |
| MR | Mark Robb |
| MR | Michael Rosenbaum, actor |
| MR | Mike Rich |
| MRMC | MR. McEwan |
| MRP | Mohammad Reza Pahlavi (Iran) |