Pronunciation: (mus'tang), [key]
1. a small, hardy horse of the American plains, descended from Spanish stock.
2. U.S. Navy Slang.a naval officer who received his commission while still an enlisted man.
to round up wild horses, esp. in order to sell them illegally to slaughterhouses.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.