Why do people scream Ay Chihuahua when they’re surprised? Where did that start? Could it have been that because the big wide eyes of a chihuahua always make it look like it’s surprised or terrified? Guess we’ll never know, and Taco Bell definitely did not tackle this etymology here, which is sad, because they usually know the answers to everything taco-related. They are like taco marketing visionaries—but I digress, we’re here to chat chihuahuas. If you know anything about the Arizona Taco Festival, it is that we created and have enjoyed the most beloved beauty pageant in the world (sorry Miss America)—The Ay Chihuahua Beauty Pageant.