Idiom: Take The Gilt Off The Gingerbread
Meanings
In the Middle Ages, gingerbread cakes were decorated with a thin layer of gold leaf. Without this casing, they were considered to be humble offerings, generally being little more than flavoured but stale bread.[1][2]
How to pronounce "take the gilt off the gingerbread":
AU
To take away the most attractive or appealing qualities of something; to destroy an illusion.