Smut

1. To gather smut; to be converted into smut; to become smutted.
2. To give off smut; to crock.
3. To clear of smut; as, to smut grain for the mill.
4. Obscene language; ribaldry; obscenity.
5. An affection of cereal grains producing a swelling which is at length resolved into a powdery sooty mass. It is caused by parasitic fungi of the genus Ustilago. Ustilago segetum, or U. Carbo, is the commonest kind; that of Indian corn is Ustilago maydis.
6. To stain or mark with smut; to blacken with coal, soot, or other dirty substance.
7. Foul matter, like soot or coal dust; also, a spot or soil made by such matter.
8. To blacken; to sully or taint; to tarnish.
9. To taint with mildew, as grain.
10. Bad, soft coal, containing much earthy matter, found in the immediate locality of faults.