"Odd One Out" is a game or activity where participants identify an item that does not belong in a group. This can involve various categories, such as animals, colors, or objects. The goal is to recognize the differences that set one item apart from the others. In educational settings, "Odd One Out" is often used to enhance critical thinking and observational skills. For example, if presented with the items cat, dog, car, and fish, the car would be the odd one out, as it is not a living creature.