when pigs fly

/wen pɪɡz flaɪ/

phrase★Intermediate💡 something that will never happen◆idiom

◆ What It Really Means

An expression used to indicate that something is extremely unlikely or impossible to happen.

¶ Literal Meaning

The moment when pigs are able to fly in the sky.

Literal Breakdown

whenat the time that+pigsdomestic animals+flyto move through the air using wings

◇ Mental Image

The mental image of pigs, which are terrestrial animals, suddenly gaining the ability to fly, which is biologically impossible.

◈ When to Use

A friend says they will help you move next weekend. You respond, 'Yeah, when pigs fly,' to humorously express your doubt.

◉ Cultural Note

The phrase is a classic example of hyperbole in English, using an absurd image to emphasize the impossibility of an event.

informal

An expression used to indicate that something is extremely unlikely or impossible to happen.

He said he'd apologize when pigs fly.

The speaker is implying that the person will never apologize.

We'll finish this project on time when pigs fly.

The speaker is expressing doubt that the project will be completed on time.

💡

Often used humorously or sarcastically to emphasize impossibility.

Synonyms

something that will never happen

something that is extremely unlikely to happen

This phrase is typically used in casual or humorous conversations to emphasize the impossibility of an event.

The phrase is often used sarcastically or humorously, so be mindful of the tone when using it.

The phrase originates from the literal impossibility of pigs flying, symbolizing something that will never occur.

Commonly used in informal contexts to express skepticism or disbelief about a future event.

English Dictionary