Meaning of the word "pigs might fly" in English

What does "pigs might fly" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

pigs might fly

US /pɪɡz maɪt flaɪ/
UK /pɪɡz maɪt flaɪ/

Idiom

used to say that you think that something will never happen

Example:
He says he'll finish the project on time, but pigs might fly.
You think she'll apologize? Pigs might fly!