Mud butt

[Justin Bieber]

when you fart, and some diarreah comes out, and coats the inside of your butt cheeks.

[Mark Zuckerberg]

The sensation of having a greasy and unwipeable ass usually occuring after consumption of large quantities of fried or fatty foods. A result of oily anal discharge, leakage, or extremely tacky fecal matter. Often accompanied by, or preceded by, The Itis.

[Justin Bieber]

Simply put, diarhea, a horrible shit that you cant hold in any longer.Commonly used on the Chappelles Show.

[PussyCat]

mud butt is when you eat sumthing that dont agree wtih you. then maybe an hour later u get cramps in ur ribs and u start to fart every 2 minutes. then ur stomach hurts and every fart is wet and hot, and sonner or later it isnt safe 2 fart, u need to shit. the moment u pop a squat on the throne, ur butthole opens up and it runs right out....and the smell is horrible!

[Tina]

Just as it sounds. When fecial matter is compounded in between your cheaks. Word created and then made popular by Dave Chappell doing a skit on his show about the side effects of Ribs, a sleeping aid for black people.

[Luis Fok]

The feeling of moist, itchy, clay-like fecal matter which remains in your anal cavity after sub-par wiping is the result of one having an extremely messy bowel movement and spending four to six hours perfroming physical activity in moderate to extreme heat. The aforementioned condition may or may not result in the dragging of ones bare anus on a coarse surface such as a carpet or snadpaper.