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.'
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.
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 squaton the throne, ur butthole opens up and it runs right out....and the smell is horrible!