Smut

Part of speech: noun (n.)

1. Foul matter, like soot or coal dust; also, a spot or soil made by such matter.

2. Bad, soft coal, containing much earthy matter, found in the immediate locality of faults.

3. 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.

4. Obscene language; ribaldry; obscenity. He does not stand upon decency . . . but will talk smut, though a priest and his mother be in the room. Addison. Smut mill, a machine for cleansing grain from smut.

Part of speech: verb (v.)

1. To stain or mark with smut; to blacken with coal, soot, or other dirty substance.

2. To taint with mildew, as grain. Bacon.

3. To blacken; to sully or taint; to tarnish.

4. To clear of smut; as, to smut grain for the mill.

Part of speech: verb (v.)

1. To gather smut; to be converted into smut; to become smutted. Mortimer.

2. To give off smut; to crock.