sixty-four-dollar question

the sixty-four-dollar question

A question that is very important and/or difficult to answer. Taken from the title of the 1940s radio program Take It or Leave It, in which the big prize was 64 silver dollars. The sixty-four-dollar question now is whether he should choose his former opponent as a running mate. A: "Do you want to get Italian or Chinese tonight?" B: "Well, that's the sixty-four-dollar question, isn't it?"
See also: question

sixty-four-dollar question

Fig. the most important question; the question that everyone wants to know the answer to. Who will win? Now, that is the sixty-four-dollar question. Now for the sixty-four-dollar question. What's the stock market going to do this year?
See also: question
References in periodicals archive ?
That is the sixty-four-dollar question,' he said in a phone interview on Tuesday.
That is a sixty-four-dollar question ($64 question)
That's the sixty-four-dollar question," says Ward, who suggests the answer hinges on your definition of art.