| Abbreviation | Definition |
|---|---|
| MGSC | Monona Grove Soccer Club |
| MHAC | Mental Health Awareness Club |
| MHAC | Morgan Hill Athletic Club |
| MHAC | Mt Hood Athletic Club |
| MHC | Money Hacker Club |
| MHCC | Mohawk Hudson Cycling Club |
| MHCH | Mixed Hockey Club Heesch |
| MHFC | Marverly Hughenden Football Club |
| MHFC | Maverley Hughenden Football Club |
| MHFC | Moonlite Hunting and Fishing Club |
| MHGC | Melbourne Hang Gliding Club |
| MHGC | Milford Haven Golf Club |
| MHRC | Mile High Run Club |
| MHSC | Montpellier Hérault Sport Club |
| MIBC | Mass Intensity Basketball Club |
| MIBC | Mercer Island Beach Club |
| MICC | Mercer Island Country Club |
| MIGC | Madeline Island Golf Club |
| MILF | Monkeys In Liberian Frathouse |
| MINC | Manhattan International Netball Club |