burst (someone's) bubble

burst (someone's) bubble

To disprove, ruin, or eliminate someone's fantasy, delusion, misbelief, or recent happiness. Sorry to burst your bubble, Janet, but Sarah only went out on a date with you to make Suzie jealous. I'm happy you won, and I don't mean to burst your bubble while you're celebrating, but your opponent could use some encouragement.
See also: bubble, burst
Farlex Dictionary of Idioms.

burst someone's bubble

Fig. to destroy someone's illusion or delusion; to destroy someone's fantasy. I hate to burst your bubble, but Columbus did not discover Canada. Even if you think I am being foolish, please don't burst my bubble.
See also: bubble, burst
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • pop (one's) bubble
  • burst the bubble of (someone)
  • pop the bubble of (someone)
  • cover
  • grab (someone or something) by the throat
  • grab someone by the throat
  • grab someone/something by the throat
  • blow (up)on (someone or something)
  • blow on
  • blow on it