be in a dream world

be in a dream world

To have unrealistic expectations or an unrealistic view of the world, often one that is more beneficial or positive for oneself than is the case. You're in a dream world if you think I'm buying you a brand-new car for your birthday. With her grades, there's no way she's getting into Harvard—she's in a dream world.
See also: dream, world
Farlex Dictionary of Idioms.
See also:
  • (one) only has one pair of hands
  • (one's) only got one pair of hands
  • I only have one pair of hands
  • I've only got one pair of hands
  • someone's only got one pair of hands
  • dream in color
  • dream in colour
  • for (one's) (own) sake
  • for sake
  • keep sight of