sixty-four million dollar question
⇨ sixty-four dollar question; sixty-four thousand dollar question; sixty-four million dollar question
noun a question that gets to the heart of the matter. The US radio quiz show
Take It or Leave It offered a highest prize of $64, giving rise to the catch-phrase 'sixty-four dollar question'. The phrase gained currency and three decimal places in televised quiz shows on both sides of the Atlantic
US, 1942