Top Definition
A smelly dust like substance that forms on the back of your jeans/pants. This is caused from a deadly combination of going commando and not changing your pants for 10+ days. This is also known as stink butt, stinky pants and stink junk.
Eww, thats gross. Eric has Dust-butt again.
by euroJuice May 18, 2008
4 Words related to Dust-Butt

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