Cat o' nine tails
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Cat´ o' nine´ tails`
n. | 1. | a whip used as an instrument of punishment consisting of nine pieces of knotted line or cord fastened to a handle; - formerly used to flog offenders on the bare back; - called also the cat. It was used in the British Navy to maintain discipline on board sailing ships. |
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.