Hello. - The boss really threw me a curve ball when he told me to deliver my report today instead of next week. - Simon always gets the highest marks in class but says he never studies at home. I can't believe it. He must be throwing me a curve. "throw someone a curve (ball)" Is the phrase often used in day-to-day speech? If someone surprises you by doing something that you don't expect, he gives you a curve ball, doesn't he?