| Abbreviation | Definition |
|---|---|
| MACS | Master-at-arms Senior Chief Petty Officer |
| MACS | ster-at-arms Senior Chief Petty Officer |
| MAM1 | ilman 1st Class Petty Officer |
| MAM1 | Mailman 1st Class Petty Officer |
| MAM2 | ilman 2nd Class Petty Officer |
| MAM2 | Mailman 2nd Class Petty Officer |
| MAM3 | ilman 3rd Class Petty Officer |
| MAM3 | Mailman 3rd Class Petty Officer |
| MANA | Marine Army Navy Air |
| MANA | Marines Army Navy and Air |
| MARINE | Moving Around Riding In Navy Equipment |
| MARINE | My A Rides In Navy Equipment |
| MARINE | My A** Really Is Navy Equipment |
| MARINE | My A**s Riding In Navy Equipment |
| MARINE | My Ass Really Is Navy Equipment |
| MASA | chine Accountant Seaman Apprentice |
| MASA | Machine Accountant Seaman Apprentice |
| MASAM | Mission And Situational Awareness Manager |
| MASN | chine Accountant Seaman |
| MASN | Machine Accountant Seaman |