blow the lid off something

blow the lid off (something)

To expose something to the public, often something scandalous or deceptive. That company's stock price plummeted after the media blew the lid off the CEO's embezzlement scandal.
See also: blow, lid, off
Farlex Dictionary of Idioms.

blow the lid off something

or

take the lid off something

JOURNALISM
If you blow the lid off or take the lid off something that has been kept secret, especially something shocking, you do something to make it known. `The Knowledge' is a new documentary series blowing the lid off music business scandals. Two or three months into therapy, people often feel worse because the treatment is taking the lid off their problems.
See also: blow, lid, off, something
Collins COBUILD Idioms Dictionary, 3rd ed.

blow the lid off something

tv. to expose a scandal or corrupt practice; to expose political dishonesty. I’m going to blow the lid off another phony candidate.
See also: blow, lid, off, something
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • (you've) got to get up pretty early in the morning to (do something)
  • a whack at (something)
  • a/the feel of (something)
  • (I) wouldn't (do something) if I were you
  • a straw will show which way the wind blows
  • a crack at (someone or something)
  • all right
  • (you) wanna make something of it?
  • all for the best
  • a thing of the past