Pie in the Sky! English Idiom! The idiom "pie in the sky" originated from a song written in 1911. The song, titled "The Preacher and the Slave," used the phrase to criticize leaders who promised rewards in the afterlife while ignoring the struggles of the present. Over time, the phrase evolved to describe any unrealistic or impractical idea or promise. #learnenglish #englishidioms #englishphrases #englishvocabulary | WordCraft Academy