Would you like fries with that? — The counter question that adds to an order. It is also a joke about low-paid jobs.
Rainmaker. — “A person (such as a partner in a law firm) who brings in new business,” in Merriam-Webster’s definition.
Hunters and farmers. — Sales teams divide the work. Hunters win new clients. Farmers grow existing accounts, often by upselling and cross-selling.
Farming a neighborhood. — A real estate agent markets to the same homeowners for years, so that they think of the agent first when they are ready to sell.