Top definition
A word to piss people off, it has no meaning and is used to make people want to know what it is, when really, means nothing at all.
Person 1: Hahaha, you're so silly.. Mdlsu
Person 2: What's mldsu stand for?
Person 1: Nothing :)
-person 2 gets irritated-
by stboy6 August 07, 2012
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