This is just simple to define. It is the slick smelly substance created from farts, sweat, poop, and anal seepage. It stays tucked in between the butt cheeks in everyones crack. It can vary in amounts, and consistency; depending on how often one takes a bath or farts. The uses for this product are many, one is to help lube the large cracks of fat people as they walk. Another one would be to load a finger with the substance to annoy someone with a stinky finger or for self defense. Also see butt grease with snow flakes, dingle berries.
I smeared butt grease on my nephews nose to stop him from farting in peoples faces.
by zeusking007 October 17, 2007

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Top Definition
Anal leakage, usually resembling cooking oil. Happens after a person gets the shits.
I was sick last month, my butt grease was hard to wash out of the sheets.
by Pyro November 21, 2002

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Residual grease found in ones butt crack. It may stem simply from sweat or sex liquid having oozed back there (or maybe sex actually having taken place there with the aid of KY warming liquid or baby oil). The person with the malady may feel an odd slippery sensation when they walk, shift in their set, or sit down.
I felt my butt cheeks slide in opposition to one another after having an explosion of butt grease caused by my queef barfing out lots of spunk and splattering my back door.
by Becki February 12, 2005

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a term refering to alchohol made in the home, or moonshine. coming from when you moon someone in a car, and your butt touches the window, it leaves a greasy streak, or shine, from you moon. moon shine= butt grease.
Dude, lets go swill some butt grease.
by ethan ravella thomas May 31, 2006

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