Multiple Username Disorder: A condition that compels those inflicted to create a multitude of aliases on websites such as 'IMDb', in order to praise or defend their own message-board posts -- the ultimate goal being to elevate these aliases to becoming the board leaders, and thereby controlling all topics of discussion. Often, the MUD sufferer will create lengthy message-board threads, in which the posts are entirely by his/her imaginary correspondents.
Every freakin' internet discussion board you check-out these days seems to have a minimum of 2 MUD cases trying to monopolize the conversation with either every single banality that pops into their boring, schizoid minds, or squabbling and name-calling as they compete for the same space – Chief Nut-job.
by nom de plumb May 21, 2009
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Acronym for Multi User Dungeon.
A text based online multiplayer game format dating back to the early days of the internet, several still popular today.
Have you created a charachter on the MUD yet?
I was up all night mudding online.
by .Justaguy November 5, 2016
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The worst kind of diarrhea, usually occurring after a bowel-angering meal. Typical stages of the mud include, but are not limited to: farts you don't want to let out for fear that it won't only be air, followed by 20+ minutes of anal hell. Allow 15 minutes for cleanup.
Colin: *knocks on bathroom door* Chris, I need in there! The Chipotle we ate wants out!

Chris: I can't leave....its the mud...THE MUUUUD!!

Colin: My God!
by ROONSKER February 25, 2011
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to have sex with many men at once; aka gang banged
That bitch got mudded by the entire crew
by wolverine365 November 3, 2010
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