Idiom
you can kiss goodbye(you) can kiss (something) goodbye
you will not get something back.If you don't close your purse, you can kiss that money goodbye.If we allow these regulations to become law, you can kiss sidewalk food carts goodbye.You can say goodbye to your job if we don't get that contract.
Etymology: based on the literal meaning of kiss someone goodbye (= to press your lips against someone else's when you are leaving them)