1. A type of cheese: This is the most common meaning. "Pecorina" refers to sheep's milk cheese, particularly Pecorino Romano, a hard, salty cheese from Italy. It can also refer to other sheep's milk cheeses from different regions of Italy.
2. Little sheep: This is a less common meaning. It's a diminutive form of "pecora," meaning "sheep."
So, when you encounter "pecorina" in Italian, you should pay attention to the context to understand its meaning. If it's related to food or cheese, it almost certainly means "sheep's milk cheese." If it's used in a more general sense, it might refer to a small sheep.