whistleblower

whis·tle·blow·er or whis·tle-blow·er or whistle blower  (hwsl-blr, ws-)

n.

One who reveals wrongdoing within an organization to the public or to those in positions of authority: "The Pentagon's most famous whistleblower is . . . hoping to get another chance to search for government waste" Washington Post.

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whistle-blowing n.

Thesaurus

Noun

1.

whistleblower - an informant who exposes wrongdoing within an organization in the hope of stopping it; "the law gives little protection to whistleblowers who feel the public has a right to know what is going on"; "the whistleblower was fired for exposing the conditions in mental hospitals" whistle blower, whistle-blower informant, source - a person who supplies information