| MUD | Macintosh Users of Delaware 
| Others |
| MUD | Made Up Drama
| Others |
| MUD | Make U Dangerous
| Others |
| MUD | Make Up Definition
| Others |
| MUD | Make up Designory
| Others |
| MUD | Make-up Designory
| Others |
| MUD | Malicious User Detection
| Others |
| MUD | Manual Utilities And Drivers
| Others |
| MUD | Manufacturer Usage Description
| Others |
| MUD | Master User Domain
| Others |
| MUD | Matched unrelated diagnosis
| Others |
| MUD | Matched Unrelated Donor
| Others |
| MUD | Matched Urelated Donor - for bone marrow transplant
| Others |
| MUD | Medieval Underground Dungeon
| Others |
| MUD | Memory Understanding and Doing
| Others |
| MUD | Metropolitan Utilities District
| Others |
| MUD | Mindfulness Using Desserts
| Others |
| MUD | Missoula Urban Demonstration
| Others |
| MUD | Most Ugly Dude
| Others |
| MUD | Mothers Under Dads
| Others |
| MUD | Multi Undergrad Destroyer
| Others |
| MUD | Multi Undergraduate Destroyer
| Others |
| MUD | Multi User Detection
| Others |
| MUD | Multi User Dialogue
| Others |
| MUD | Multi User Dimen
| Others |
| MUD | Multi User Dimension
| Others |
| MUD | Multi User Dimensions
| Others |
| MUD | Multi User Domain
| Others |
| MUD | Multi User Dungeon
| Others |
| MUD | Multi User Dunqeon
| Others |
| MUD | Multi-User Dimension
| Others |
| MUD | Multi-User Dimensional
| Others |
| MUD | Multi-User Dungeon
| Others |
| MUD | Multiple Undergraduate Destroyer
| Others |
| MUD | Multiple User Dialogue
| Others |
| MUD | Multiple User Domain
| Others |
| MUD | Multiple User Dungeon
| Others |
| MUD | Multy User Dungeon
| Others |
| MUD | Municipal Utility District
| Others |