Cheesy Pizza

Listen up, buttercup. This joke is all about words sounding alike but meaning different things. "Cheesy" can mean that something has a lot of cheese, like pizza. But it can also mean that something is corny or dumb. This joke uses the two meanings of "cheesy", which is why it is called a pun. I bet you still don't understand because your brain is the size of one of those tiny pepperoni they put on pizza.