| Abbreviation | Definition |
|---|---|
| MSYC | Montreal Street Youth Cohort |
| MSYF | Mahomet Seymour Youth Football |
| MSYF | Mat-Su Youth Facility |
| MSYF | Mulnivasi Student Youth Front |
| MSYG | Middle School Youth Group |
| MSYM | Maine Summer Youth Music |
| MSYM | Middle School Youth Ministry |
| MSYO | Marin Symphony Youth Orchestra |
| MSYO | Modesto Symphony Youth Orchestra |
| MSYP | Members of the Scottish Youth Parliament |
| MSYR | Maryland Sheriffs Youth Ranch |
| MSYT | Main Street Youth Theatre |
| MSYW | Melbourne Sikh Youth Wing |
| MTY | Motivational Talks for Youth |
| MVYF | Moreno Valley Youth Federation |
| MVYO | Mon Valley Youth Orchestra |
| MW | Madhu & Wajid |
| MWYC | Macedonian World Youth Congress |
| MWYC | Marcus Whitfield Youth Camp |
| MYAC | Mayor's Youth Advisory Commission |