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
SÉArlait	SHAHR-lat	Irish
Tulio	-	Spanish
Ahab	['eihæb]
Lily	LIL-ee	English
Gili	-	Hebrew
Swapna	-	Indian, Telugu, Marathi