English Idioms is the place where skies have Blue Moons, people have butterflies in their stomach, and you can cross your bridge before you have come to it
A blue moon means “something absurd, improbable”. Because a blue moon is a rare event. Only recently, since the 1940s has “blue moon” come to signify the second moon in a month because of a popular a popular belief spread by The Maine Almanac in 1937. The blue coloration is given by volcanic ash other suspended particles so remember: never take an IDIOM at face value, let alone the moon!
Want to have a HEAD START with idioms (espressioni idiomatiche) ? Then it is ABOUT TIME we did. We divided idioms into categories so do not SCREAM BLUE MURDER if you see just a few. Our idioms are used in everyday conversation, others are not, so we made a selection for you!