A: How about watching a movie tonight? The “Fantastic Beasts” sequel is in theaters now.

B: Another fantasy film? I’ll pass.

A: Come on, you will love this picture. I promise you it will knock your socks off. It’s highly reviewed by both moviegoers and critics.

Note: This idiom means “to take someone by surprise” and “very impressive.” It comes from the adult entertainment industry of the 1940s and 1950s. At that time, men were difficult to cast because they were generally camera shy. When appearing on camera, the men would routinely wear sunglasses to disguise their looks, and for some odd reason they also wanted to wear dark-colored socks. It was said that if one of these adult movies was especially provocative, it was said, more or less as a joke, to have the power to “knock your socks off.”