ETYM Akin to lg. mudde, Dutch modder, German moder mold, OSw. modd mud, Swed. modder mother, Dan. mudder mud. Related to Mother a scum on liquors.
1. Slanderous remarks or charges.
2. Water soaked soil; soft wet earth; SYN. clay.

ETYM See Mud (n.).
To plaster with mud.

Acronym for multiuser dungeon. A virtual environment on the Internet in which multiple users simultaneously participate in a role-playing game—generally a medieval fantasy, hence the “dungeon”—and interact with each other in real time. Also called: multiuser simulation environment.