'What is a blue moon exactly?' and you are likely to get one of three answers: 1. Duh. 2. It's the second full moon in a calendar month. 3. It's when the moon looks blue. Click here to read all about the blue moon. We use the phrase when we are referring to something that rarely to *never* happens.
"We realized that the important thing was not the film itself but that which the film provoked." Fernando Solanas