Sharp Italian cheese is a term used to describe two types of cheese: Romano and Pecorino. Romano is a hard, salty cheese made from sheep's milk that has been aged for at least five months. It has a sharp, tangy flavor and is often used as a grating cheese. Pecorino is also a hard cheese made from sheep's milk, but it is aged for a longer period of time, up to one year. It has a nutty, slightly sweet flavor and is often used as a table cheese. Both Romano and Pecorino are popular cheeses in Italy and are widely used in Italian cuisine.