There's a character known as the Soup Nazi... if you do something in his store that he doesn't like (such as looking at him, or saying something innocuous) he sends you to the back of the line, or shouts "No soup for you, one year!". Since the soup is so good, this is a terrible punishment.
Grouper was the fish that popped into my mind that rhymes with "soup".
Figured you would have known since you called him the Sushi Nazi.