drop a bomb

drop a bomb

To reveal something that is very surprising or unexpected. Whoa, you can't just drop a bomb like that and leave—I need details about your new boyfriend! When we got a tip that the newspaper was about to drop a bomb about our candidate, we all wondered what information they could possibly have.
See also: bomb, drop
Farlex Dictionary of Idioms.

drop a bomb(shell)

 and explode a bombshell; drop a brick
Fig. to announce shocking or startling news. They really dropped a bombshell when they announced that the mayor would resign. Friday is a good day to drop a bomb like that. It gives the business world the weekend to recover. They must choose their words very carefully when they explode a bombshell like that. They really dropped a brick when they told her the cause of her illness.
See also: bomb, drop
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

drop a bomb

verb
See drop a brick
See also: bomb, drop
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • explode
  • drop a bombshell
  • drop a bombshell, to
  • explode a bombshell
  • have a kick to it
  • have a kick to it/them
  • double buffalo
  • take it easy
  • take it/things easy
  • shut the door on