When a dishonest person is selling a service to the market with the very lowest price of them all, they are probably chinsing their customers somewhere, somehow or someway to earn themselves a buck.
Tom left a $1 tip on a $30 bill at a restaurant. James looks at him and says, "Why you chinsing out on the tip, man? You have to leave at LEAST 15%..."
When you bite into something hot and cheesy, such as pizza or a sandwich, and the cheese layer slides off and smacks your chin and throat causing minor to severe burns.