Top Definition
1. The actual lubricant, that creates the sliding sensation when you walk, in an exceptionally greasy ass crack.

2. Feces with the consistency of 78 degree butter or pudding.
Dude do you have a napkin? I think I have some brown butter and need to do a butt check.

I just farted and think I have some brown butter; I'll be right back.
by littlebuddysd October 30, 2010

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