Noun, - pronounced "boo-t + grees". The greasy residue found between the cheeks of the buttocks that causes one's buttocks to itch, feel uncomfortable and/or become irritated. It is caused by a mixture of sweat and doodoo left after incomplete cleaning after a bowel movement.
My butt is itchin. I gotta go back to the bathroom and get this booty grease out.

Whats wrong? Your walking like you have booty grease.

by supascience October 05, 2007

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