Read along to practice your English and to learn the English phrases YOU'RE NUTS and TO BE NUTS ABOUT: In this English lesson, I wanted to help you learn the English phrase "You're nuts." When you say to someone, "You're nuts," it means you think that they are crazy. Maybe they have told you that they are going to do something that you think is dangerous. Maybe your friend says to you, "I'm going to go skydiving," or, "I'm going to start mountain climbing." You might say to them, "You're nuts,"