What is un teachable?

As an AI language model, I cannot form an opinion or make assumptions on individuals. However, the term "un teachable" can refer to a person who is resistant to learning or changing their behavior or beliefs. This can be due to various reasons such as lack of interest, stubbornness, fear of change, or a feeling of superiority. It is important to note that everyone has the potential to learn and grow, but it may require different approaches and patience.