Meaning of leather-lunged

leath•er-lunged

Pronunciation: (le'ur-lungd'), [key]
— adj.
  1. speaking or capable of speaking in a loud, resonant voice, esp. for prolonged periods: The leather-lunged senator carried on the filibuster for 18 hours.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.