What is a knife with a hole in the blade called?

A knife with a hole in the blade is commonly referred to as a "holey knife" or "perforated knife." The hole is designed to reduce friction and prevent food from sticking to the blade, making it easier to slice through items like cheese or dough. Some specific types of knives with holes include the "slicing knife" and "chef's knife" variants that feature this design for enhanced performance in food preparation.