| Abbreviation | Definition |
|---|---|
| MUFH | Monmouth University Field Hockey |
| MUFL | Manly Ultimate Frisbee League |
| MUFL | Mentor Ultimate Frisbee league |
| MUFL | Mid Ulster Football league |
| MUG | Make-Up Games |
| MUG | Moves of Uncommon Greatness |
| MUG | Multi User Game |
| MUGS | Multi-User Games System |
| MUGT | Michelob Ultra Golf Tour |
| MUHC | Manchester University Handball Club |
| MUT | Mountain/Ultra/Trail Running |
| MUTD | Manchester United Till Death |
| MUTS | Manchester Universities Trampolining Society |
| MUTS | Michigan United Tandem Society |
| MVA | Manitoba Volleyball Association |
| MVB | Men's Volleyball |
| MVBC | Mohawk Valley Bicycling Club |
| MVC | Missouri Valley Conference |
| MVC | Monticello Velo Club |
| MVGC | Mill Valley Golf Course |