blown the whistle

Alerted the authorities

Blown the whistle means to have exposed wrongdoing or alerted authorities to misconduct.

The image comes from a referee's whistle stopping play when rules are violated.

Someone who has blown the whistle on corruption, fraud, or illegal activity has brought it to public attention or reported it to those in power: She blew the whistle on the company's accounting fraud.

The person who does this is a whistleblower.

Related

go public · breaking silence · courageous · disclosure · betrayal · retaliation · ethics · moral courage · accountability · snitch · transparency · leaked · tell the truth · speak up · justice · compliance · loyalty · oversight

Opposites
exposure vs. concealment

blown the whistlecovered up

hushed up · concealed · suppressed · buried · hidden

loyalty vs. disclosure

blown the whistlelooked the other way

Deliberately avoided noticing

turned a blind eye · closed ranks · toed the line · played along · gone along with

action vs. inaction

blown the whistlestood by

Supported or awaited

let it go · looked the other way · turned a blind eye · said nothing · kept one's mouth shut

Family

blown, whistle, blow, blows, blowing, blew, whistles, whistled, whistling

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Everyday, not technical · Rated G