| Abbreviation | Definition |
|---|---|
| MKYRA | Missouri Kansas Youth Rodeo Association |
| MMYN | Multicultural Multifaith Youth Network |
| MMYN | Multifaith Multicultural Youth Network |
| MMYO | Mainly Mozart Youth Orchestra |
| MMYO | Mid Maine Youth Orchestra |
| MMYO | Mukono Multipurpose Youth Organisation |
| MMYT | Mayflower Musical Youth Theatre |
| MMYTC | Mingus Mountain Youth Treatment Center |
| MOBY | McKernan Outreach Baptist Youth |
| MOM | Month Of May |
| MOTHER | Multi Talented Out Standing Teacher Helper Entertainer Respectful |
| MOY | Mediterranean Office for Youth |
| MOYA | Ministry Of Youth Affairs |
| MPY | Middlesex Partnerships for Youth |
| MPYC | Madhya Pradesh Youth Congress |
| MPYS | Manatee Palms Youth Services |
| MRYR | Mountain River Youth Ranch |
| MSIY | Mentoring System Involved Youth |
| MSY | Media Smart Youth |
| MSYC | Mid-South Youth Campus |