| MUD | a puddle of mud |
|---|---|
| MUD | larval salamander of mountain lakes of Mexico that usually lives without metamorphosing |
| MUD | large salamander of North American rivers and streams |
| MUD | aquatic North American salamander with red feathery external gills |
| MUD | a stain produced by mud |
| MUD | bottom-dwelling freshwater turtle inhabiting muddy rivers of North and Central America |
| MUD | covered with or as if with mud |
| MUD | large catfish of central United States having a flattened head and projecting jaw |
| MUD | flesh of scaleless food fish of the southern United States |
| MUD | a racehorse that runs well on a muddy racetrack |
| MUD | (of color) discolored by impurities |
| MUD | the quality of being cloudy |