promise (one) the world

promise (one) the world

To promise one something that is not feasible or cannot be done. Your clients will come to distrust you if you keep promising them the world and then inevitably fail to deliver.
See also: promise, world
Farlex Dictionary of Idioms.
See also:
  • promise (one) the earth
  • promise the earth
  • promising
  • promise the moon
  • promise the moon/earth/world
  • promise (one) the moon
  • promise someone the moon
  • keep a promise
  • keep (one's) promise
  • breach of promise