When the pig can fly意思

"When the pig can fly" is an English idiom that means something that is highly unlikely to happen, especially something that is traditionally considered impossible or very difficult. It is often used to express skepticism or disbelief about the possibility of a particular event or situation occurring.

The phrase is similar to other expressions such as "when hell freezes over," "when monkeys fly out of my butt," or "when pigs fly." These idioms are used for dramatic effect to emphasize that the speaker believes a certain event is extremely improbable or impossible.

For example, if someone said, "I'm going to be the next president of the United States," you might respond with, "When the pig can fly!" to imply that you think it's highly unlikely they will achieve that goal.