I'll prepare a really disgusting meal for the slave today - I put a breadroll on the dirty ground of the parking lot and then drive over it with my car. It's crushed under the heavy tire immediately, but it's not dirty enough for the slave - so I take a short drive through the parking lot and drive through some mud to get the tire really dirty! Then I drive back to the slave and drive over his food a few more times. Now it's properly dirty! I get out of the car and order the slave to start eating. He has to eat this filthy food from the ground of the parking lot. I also walk through the mud, step on his food and order him to lick the food from my muddy boots as well. Then I drive over his food one more time with the car, get out again, spit on the tire and order him to lick all the dirt, food and spit from the tire!
