promise the moon

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promise (one) the moon

To promise someone something that cannot be done. Your clients will come to distrust you if you keep promising them the moon.
See also: moon, promise

promise the moon (to someone)

 and promise someone the moon
to make extravagant promises to someone. Bill will promise you the moon, but he won't live up to his promises. My boss promised the moon, but never gave me a raise.
See also: moon, promise

promise the moon

If someone promises the moon, they promise to do or give things that they cannot in fact give. Politicians promise the moon at election time, but do they deliver once they're elected?
See also: moon, promise

promise (somebody) the ˈmoon/ˈearth/ˈworld

(informal) make very big or impossible promises that you are unlikely to keep: He promised her the moon, but after ten years of marriage they hardly had enough to live on.
See also: earth, moon, promise, world
References in periodicals archive ?
You might find you promise the Moon and only deliver a handful of stars -impressive, but not enough.
So the approach seems to be: Promise the moon and the stars to get a bond passed and worry about fulfillment later.
Medical software salespeople have been known to promise the moon.
Bush likes to promise the moon, as he did when he pledged to eradicate global terrorism.
They can promise the moon, but Joe Sixpack is not going to believe they can deliver the moon.
So were the ads, which seemed to promise the moon, and the trainers, who explained things in a language that only computer jocks could understand.