whistle-blower

or whis·tle blow·er

[ hwis-uh l-bloh-er, wis- ]
/ ˈʰwɪs əlˌbloʊ ər, ˈwɪs- /

noun

a person who informs on another or makes public disclosure of corruption or wrongdoing.

Origin of whistle-blower

First recorded in 1965–70

OTHER WORDS FROM whistle-blower

whis·tle-blow·ing, noun

British Dictionary definitions for whistle blower

whistle-blower

noun

informal a person who informs on someone or puts a stop to something