What's a PET NAME?

If two people are LIKE CHALK AND CHEESE, they are:

When you want to emphasize that the result of a present situation will be revealed in the future, we say: TIME WILL ____.

When something is too expensive, we can say it’s going to ______ the bank:

When food or drink in a bar or restaurant is ON THE HOUSE 🏠, it means:

When something is "SELLING LIKE HOT _____ ," it means a lot of people are buying it quickly. What’s the correct word?