| Abbreviation | Definition |
|---|---|
| LYT | Lexington Youth Theatre |
| LYT | Lighthouse Youth Theatre |
| LYT | Limerick Youth Theatre |
| LYT | Lyceum Youth Theatre |
| LYTE | Leading Youth Through Empowerment |
| LYTE | Liberating Youth Through Entertainment |
| LYTE | Longwood Youth Theater Experience |
| LYTS | Louisiana Youth Tobacco Survey |
| LYV | Loudoun Youth Volleyball |
| LYVYSA | Lower Yakima Valley Youth Soccer Association (Washington state) |
| LYW | London Youth Whitecaps |
| M8 | Mate (England) |
| MABY | Muslim Association of Britain Youth |
| Madison | Marvelous Adorable Dazzling Intelligent Sweet Open hearted Nice |
| MAGY | Memphis Area Gay Youth |
| MANY | Mid-Atlantic Network of Youth |
| MAYA | Movement for Alternatives and Youth Awareness |
| MAYA | Muslim Arab Youth Association |
| MAYLA | Metro Atlanta Youth Lacrosse Association |
| MAYLA | Milwaukee Area Youth Lacrosse Association |