burst someone's bubble

burst (one's) bubble

To bring someone back to reality, especially if they are dreaming or fantasizing about something unrealistic. Look, I hate to burst your bubble, but there is no way you're getting into Harvard! You're a C student!
See also: bubble, burst
Farlex Dictionary of Idioms.

burst someone's bubble

If someone or something bursts your bubble, they stop you being so happy or satisfied. A terrible defeat in Saturday's match burst their bubble. Costa burst her bubble, telling her that her boyfriend had been arrested.
See also: bubble, burst
Collins COBUILD Idioms Dictionary, 3rd ed.

burst someone's bubble

shatter someone's illusions about something or destroy their sense of well-being.
See also: bubble, burst
Farlex Partner Idioms Dictionary
See also:
  • burst (one's) bubble
  • burst bubble
  • burst somebody's bubble
  • bust (one's) bubble
  • bring (one) back to reality
  • bring back to reality
  • bring somebody/come down to earth
  • come down to earth
  • get your head out of the clouds
  • Get your head out of the clouds!