cloud cuckoo land

The phrase "cloud cuckoo land" is an idiomatic expression used to describe a state of unrealistic or imaginary thinking divorced from reality. It refers to an idealized or utopian place where everything is perfect and idyllic, often implying a sense of impracticality or naivety. It is typically used to criticize someone's unrealistic or far-fetched ideas or plans. The phrase has its origins in the play "The Birds" by Ancient Greek playwright Aristophanes, where the character of a utopian city called "Cloud Cuckoo Land" is introduced.