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Meaning of take-no-prisoners

take-no-pris•on•ers

Pronunciation: (tāk'nō"priz'u-nurz, -priz'nurz), [key]
  1. wholeheartedly aggressive; zealous; gung-ho: a businessman with a take-no-prisoners attitude toward dealmaking.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.