to be messy, or untidy.

particularly gelatinous items
"jeffery! get upstairs and clean your room, its been slustard for over two weeks!"
by listypoos September 20, 2004
Top Definition
A girl like a slut she spreads her legs easy and smooth like mustard
"hey dude got myself some slustard, ran so smooth all night
by mitzul September 16, 2009
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