Owa Tagoo Siam!
Tell your guests that the Siamese national slogan is very intricate and that only really intelligent people can learn it, but that you have a way of teaching it so that even the simplest person can grasp it immediately. Ask them to repeat what you say. “Owa!” with emphasis on the o; “Tagoo!” with emphasis on the goo; “Siam!” Then ask them to repeat, running all three words together. They will have to do it over and over with much help and encouragement from you before they appreciate the full meaning of your scornful “Well I should say you are!”
Finally they arrive. Each one is exclaiming “Oh what a goose I am!”