dirt that is permantly on a man's hand no matter the amount of cleaners and washing you use.

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

A permanent state of dirty looking hands. A mixture of dirt and grease that stays on your hands no matter how many times, or how vigorously they are washed. Common for men in trades like automotive mechanic, heavy trucking, and welding. The hands will appear dirty and can be anywhere from slightly-dirty, to completely black

Skin that permanently looks dirty and darker from obese people, notably in their fat folds.