live in cloud-cuckoo land

live in cloud-cuckoo land

To believe that unrealistic, idealized, and/or fanciful ideas will happen, when in fact they are beyond the realms of possibility. Tom thinks he'll be able to live off his bad poetry—he's living in cloud-cuckoo land if you ask me!
See also: land, live

live in cloud-cuckoo land

to believe that things you want will happen, when really they are impossible Anyone who thinks this project will be finished within six weeks is living in cloud-cuckoo land.
See also: land, live
References in periodicals archive ?
I do believe that union leaders live in cloud-cuckoo land.