1. The accumulation of feces that has then solidified at the back of the toilet bowl and or toilet seat resulting in a "crust" like feature. This is usually a result of late model toilets where the diameter of the bowl is to small for the seated individual.
2. Residual food particulates and or mouth prints around the "rim" of a glass after having been put through a dish washing cycle.
3. The accumulation of feces in the hair around the anus of a "Lap dog"

When you eat dirt for the first time and leave your family to build a shack in the woods