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
Jasmine	JAZ-min (English), zhas-MEEN (French)	English, French
Aymar	['eimə]
Lucile	loo-SEEL	French, English
Whitman	['hwitmən]
Marilena	mah-ree-LE-nah (Italian)	Italian, Romanian
Bayard	-	Literature