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!

Common Names:

Name	Pronounced	Usage
Beatrix	BE-ah-triks (German), BAY-ah-triks (Dutch), BEE-ə-triks (English)	German, Hungarian, Dutch, English (Rare), Late Roman
Hamlet	HAM-lət (English)	Literature, Armenian
Gian	-	Italian (Archaic)
Adrijan	-	Croatian, Macedonian
Afonso	a-FAWN-saw (Galician)	Portuguese, Galician
Ermis	-	Greek