bring back to reality

bring (one) back to reality

To cause one who is fantasizing or being overly optimistic to remember or consider the true nature of something. Someone needs to bring him back to reality because there's no way he's getting into that school with his mediocre grades. I was excited to book a vacation until my nearly-depleted bank account brought me back to reality.
See also: back, bring, reality
Farlex Dictionary of Idioms.

bring someone back to reality

to force someone to face reality. The rain shower brought her back to reality. Liz was brought back to reality by a rude shock.
See also: back, bring, reality
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • bring (one) back to reality
  • come down to earth
  • bring somebody/come down to earth
  • bring (one) down to earth
  • bring down to earth
  • burst (one's) bubble
  • burst bubble
  • burst somebody's bubble
  • burst someone's bubble
  • bust (one's) bubble