whistle-blow

== English == === Alternative forms === whistleblow === Etymology === Back-formation from whistleblowing or whistleblower, equivalent to whistle +‎ blow. === Verb === whistle-blow (third-person singular simple present whistle-blows, present participle whistle-blowing, simple past whistle-blew, past participle whistle-blown) (rare) To blow the whistle (on); to report (as a whistleblower).