| Abbreviation | Definition |
|---|---|
| MARSH | Musicians Artists Recordmakers Superfine Hang |
| MARSH | Musicians Artists Recordmakers Superfine Hangout |
| MAS | Music And Strategy |
| MASL | Musicians' Association of Saint Louis |
| MASS | Music Architecture Sonic Sculpture |
| MASS | music arts sights and sounds |
| MASS | Musical Architecture Sonic Sculpture |
| MATB | Music and the Brain |
| MATD | Music And The Deaf |
| MATM | Me And That Man |
| MAWP | Music and Art in Wright Park |
| MAYO | Musical Arts Youth Orchestra |
| MB | Marching Band |
| MB | Mindless Behavior |
| MB | Mindless Behavior (Boy Band) |
| MB | Mindless Behaviour |
| MB | Modern Bass |
| MB20 | Matchbox Twenty |
| MBAF | MikeBurn And Friends band |
| MBBB | Melvin Beddow Big Band |