Definition of emperor's new clothes in English English dictionary
Something obvious and embarrassing that is politely ignored or that goes unacknowledged
How did it come to this, that Toyota is now selling a hybrid gas-electric vehicle with no tangible fuel economy benefits?.
a fairy tale (=old children's story) by Hans Christian Andersen about an emperor who pays a lot of money for some new magic clothes which can only be seen by wise people. The clothes do not really exist, but the emperor does not admit he cannot see them, because he does not want to seem stupid. Everyone else pretends to see the clothes too, until a child shouts, "The Emperor has no clothes on!" The title is often used to describe a situation in which people are afraid to criticize something because everyone else seems to think it is good or important