ENGLISH
REFERENCE

blow the whistle

idiom
Meaning

To disclose information to the public or to appropriate authorities concerning the illegal or socially harmful actions of a person or group, especially a corporation or government agency.


Origin

disputed origin

When used idiomatically, probably an allusion to a police officer blowing his or her whistle on observing a violation of the law.

Examples
SIMPLE

The employee decided to blow the whistle on the company's illegal activities.

CONTEXTUAL

After discovering that the factory was dumping waste into the river, the manager decided to blow the whistle to the local authorities.

COMPLEX

Despite the threat of losing his pension, the accountant felt morally obligated to blow the whistle on the systemic fraud occurring within the corporation.

Anchors to
Related idioms8entries
  1. 01

    blow a fuse

    To lose one's temper; to become enraged.

  2. 02

    blow a hole through

    To destroy the integrity or cohesion of.

  3. 03

    blow a kiss

    To kiss one's own hand, then blow on it in a direction towards the recipient.

  4. 04

    blow away

    To kill (someone) by shooting them with a firearm.

  5. 05

    blow chunks

    To vomit chunks of undigested food.

  6. 06

    blow hot air

    To engage in empty or exaggerated talk that lacks substance, credibility, or truth; to bluster.

  7. 07

    blow hot and cold

    To behave inconsistently; to vacillate or to waver, as between extremes of opinion or emotion.

  8. 08

    blow me

    An expression of discontent or aggravation to another party (with a metaphorical connotation of fellatio).

© 2026 English Reference