You could call him "Gonit" so that way every time you get mad at him, you can say, "DOG GONIT!"
You could call him "Watdog" so any time someone asks you his name, you can say, "WATDOG?" Then they say, "That dog!" and you say, "Watdog" again and try to see how many times you can get them to keep asking.
You could call him "Bitem" so any time someone asks you his name, you can say, "BITEM!" every time the person asks.
You could call him, "Nottadog" so any time someone asks you his name, you can say, "He's Nottadog" and the conversation just gets more interesting when they ask their next question.