† ˈsmutchinObs.rare. [ad.Ir.smuiteán, smúiteán powder, fine ashes, soot, =Sc.Gael.smuidean a mote, particle of dust.] Snuff. 1650Howell Lett. III. 12 The Spaniards and Irish take it [tobacco] most in powder or smutchin, and it mightily refreshes the brain.Ibid., Their boxes of smutchin.