La-La land , La La land, la-la land
1 n-uncount People sometimes refer to Los Angeles, in particular the Hollywood district of Los Angeles, as La-La land.
HUMOROUS, INFORMAL ...her position as La-La land's premiere hairdresser.
2 n-uncount People sometimes use La-La land to mean an imaginary place.
INFORMAL
(=cloud-cuckoo land)
For much of the time he was in hospital, he was under sedation. `I was in La La Land,' he said.