N. The outcome of when one can no longer hold in their feces and uncontrollibly sharts whilst sitting. In an attempt to hide it just lets it stay and hopes noone notices. After a while the squished feces crusts over leaving a hard misshapen lump of poop stuck to your back side.

Expression: Used to express intence anger, dissapointment and/or denial.
I'd better clean this up if I don't want to deal eith booty crust later.

That's booty crust! I didn't do that!
by Lilblacboy April 16, 2014
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The state of being offensive to one or more of the human senses.
Dude, I gots wit dat hoe back up in my crib last night. This mornin', in the light, I saw her thong....she gots some RANK STANK BOOTY CRUST.
by Violated Centaur March 10, 2005
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