Smut n.
 1. Foul matter, like soot or coal dust; also, a spot or soil made by such matter.
 2. Mining Bad, soft coal, containing much earthy matter, found in the immediate locality of faults.
 3. Bot. An infection 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 Ustilago 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.


 Dust n.
 1. Fine, dry particles of earth or other matter, so comminuted that they may be raised and wafted by the wind; that which is crumbled to minute portions; fine powder; as, clouds of dust; bone dust.
    Dust thou art, and unto dust shalt thou return.   --Gen. iii. 19.
    Stop! -- for thy tread is on an empire's dust.   --Byron.
 2. A single particle of earth or other matter. [R.] “To touch a dust of England's ground.”
 3. The earth, as the resting place of the dead.
    For now shall sleep in the dust.   --Job vii. 21.
 4. The earthy remains of bodies once alive; the remains of the human body.
    And you may carve a shrine about my dust.   --Tennyson.
 5. Figuratively, a worthless thing.
    And by the merit of vile gold, dross, dust.   --Shak.
 6. Figuratively, a low or mean condition.
    [God] raiseth up the poor out of the dust.   --1 Sam. ii. 8.
 7. Gold dust; hence: (Slang) Coined money; cash.
 Down with the dust, deposit the cash; pay down the money.  [Slang] “My lord, quoth the king, presently deposit your hundred pounds in gold, or else no going hence all the days of your life. . . . The Abbot down with his dust, and glad he escaped so, returned to Reading.” --Fuller.
 Dust brand Bot., a fungous plant (Ustilago Carbo); -- called also smut.
 Gold dust, fine particles of gold, such as are obtained in placer mining; -- often used as money, being transferred by weight.
 In dust and ashes. See under Ashes.
 To bite the dust. See under Bite, v. t.
 To raise dust, or To kick up dust, to make a commotion. [Colloq.]
 To throw dust in one's eyes, to mislead; to deceive. [Colloq.]