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
Naheed	-	Persian
Ramses	RAM-seez (English)	Ancient Egyptian (Hellenized)
Liesje	LEE-shə	Dutch
Anish	-	Indian, Hindi, Marathi
Allycia	ə-LIS-yə, ə-LIS-ə, ə-LISH-ə	English (Rare)
Galila	-	Arabic