never-never landnev·er-nev·er land
Origin of never-never landafter the imaginary land in Peter Pan (1904), play by J. M. Barrie1
Origin of never-never landAfter Never-Never Land , fictional setting used in the play Peter Pan by J.M. Barrie
One is said to be "off in never-never land" when one is coming up with completely impractical ideas, distracted, etc. "Going to Never Never Land" can also mean going to sleep, or, more darkly, dying. Listen to "Enter Sandman" by Metallica for further reference.