Don’t throw the baby out with the bath water. A bird in the hand is worth two in the bush. Idioms, sayings, cliches are such a common part of our everyday life that we hardly stop to wonder where they come from, or why some stick around while others go the way of the dinosaurs. A new book is out that explores all this: “Watch Your Tongue: What Our Everyday Sayings and Idioms Figuratively Mean.”