burst (someone's) bubble(redirected from bursting their 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.
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.