Meaning of bull-roarer

bull-roar•er

Pronunciation: (bool'rôr"ur, -rōr"-), [key]
— n.
  1. a wooden slat that produces a roaring sound when whirled around one's head on the end of a string or thong, used by some peoples of the world in religious ceremonies and by others as a toy. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.