Meaning of sou marqué

sou mar•qué

Pronunciation: (s' mär-kā' or, for 2, -kē' Fr. s-mar-kā'), [key]
— pl. sous mar•qués
  1. a billon coin of France, issued in the 18th century for circulation in the colonies.
  2. something that has little or no value.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.