Meaning of the word "promise someone the moon" in English

What does "promise someone the moon" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

promise someone the moon

US /ˈprɑmɪs ˈsʌmˌwʌn ðə mun/
UK /ˈprɒmɪs ˈsʌmˌwʌn ðə muːn/
"promise someone the moon" picture

Idiom

to make extravagant or impossible promises to someone

Example:
He's always trying to promise someone the moon to get what he wants, but he never delivers.
Don't believe him, he's just trying to promise you the moon to get your vote.