When one does not whipe properly and leaves shit all over their asshole and allows it to dry. Friction then causes a flaking of the dried poo and accumulates in ones underwear, often in a fine powder.
An ass crispy: the lint at the top of your asscrack mixed with sweat and discharge after strenuous activity. The color varies depending on the undergarment color you are wearing. Commonly mistaken for dingleberries.