Promise (one) the moon British verb phrase UK informal
To make a promise that cannot be kept.
Don't trust in him. He just promises you the moon.
The government said that they would reduce taxes, but it turned out that they promised the moon.
Peter is having an affair with his secretary again. He told me that he made a break with her, but he promised the moon.
Used to say that what you're saying is true, or that you'll do what you promise .
To do what you promised to do or what people expect you to do
Something that is impossible to happen, to achieve, or to be done.
Promises do not guarantee that something will happen.
The verb "promise" should be conjugated according to its tense.