| Abbreviation | Definition |
|---|---|
| MBAA | Mountain Bike Association of Arizona |
| MBBL | McGuane Bridgeport Baseball League |
| MBC | Masterful Blade Champion |
| MBCL | Marathi Box Cricket League |
| MBH | Michigan Bow Hunters |
| MBH | Midget Bowling Handbook |
| MBI | Messianic Bureau International |
| MBL | Monville Battler League |
| MBL | Muslim Basketball League |
| MBPA | Munirah Basketball Players Association |
| MBR | Mountain Bike Rider |
| MBS | Mind, Body, And Spirit |
| MBS | Mountain Board Sports |
| MBT | Mountain Bike Trail |
| MBUC | Marina Bay Urban Challenge |
| MBWT | Malolo Blue Water Tackle |
| MBYC | Macatawa Bay Yacht Club |
| MC | Marathon Concept |
| MC | Motocross |
| MCA | Madras Cricket Academy |