| Abbreviation | Definition |
|---|---|
| MFV | Marathon Female Veteran |
| MFW | Miscellaneous FITNESS WEIGHTS |
| MGA | Massachusetts Golf Association |
| MGA | Metropolitan Golf Association |
| MGA | Mounted Games Association |
| MGBS | Middle Georgia Bowling Senate |
| MGI | Mobile Games Interoperability |
| MGK | MiniGolfKlubb |
| MGLF | My Good Life Fitness |
| MGLF | University of Michigan Golf |
| MGLI | Man Games Lost to Injury |
| MGLI | Michigan Great Lakes International Draft Horse Show and Pull |
| MGLL | Massachusetts Bay Girls Lacrosse League |
| MGP | Manx Grand Prix |
| MGRW | Mardi Gras Race Week |
| MGS | Machine Groomed Snow |
| MH | Mika Hakkinen |
| MH | Multi Hand |
| MHA | Maine Horse Association |
| MHD | Mexican Hat Dance |