whistleblower

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whistleblower

Someone who provides inside information in order to publicly reveal or call attention to corruption or some wrongdoing within some corporate or political organization. Sometimes hyphenated or spelled as two words. The CEO is now facing a 10-year prison sentence, thanks to information provided by a whistleblower within the company. The whistleblower has faced numerous death threats since coming forward about the government agency's misuse of power.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

whistle-blower

n. someone who calls a halt to something; an informer; an enforcer; a stool (pigeon). I don’t know who the whistle-blower was, but a good time was really ruined.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
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