What does the idiom pie in sky mean?

The idiom "pie in the sky" means something that is unrealistic, impractical, or impossible to achieve. It implies a hope or dream that is based on wishful thinking rather than concrete plans or possibilities.

Origin:

The phrase is thought to have originated in a 1911 song by the Industrial Workers of the World (IWW), called "The Preacher and the Slave." The song contained the lyrics, "You'll get pie in the sky when you die."

Usage:

Here are some examples of how "pie in the sky" is used:

* "His promises of a million-dollar salary are just pie in the sky."

* "The idea of flying cars is pie in the sky for now."

* "Don't get caught up in pie-in-the-sky dreams and forget about reality."

Synonyms:

* Castle in the air

* Daydream

* Utopia

* Fantasy

* Wishful thinking

Antonyms:

* Realistic

* Practical

* Achievable

* Feasible

* Tangible