A "cool cat" is someone who is confident, stylish, and laid-back, but what are the antonyms of this term? Well, the opposite of being cool is being uncool, which means awkward, clumsy, and lacking in social skills. A person who is an uncool cat is often avoided by others due to their unfriendly personality and lack of social charm. Another antonym for a cool cat could be a "nervous wreck," someone who is anxious, fearful, and panicky. This person is the complete opposite of cool, calm, and collected. So, while being a cool cat is desirable, being an uncool cat or a nervous wreck would not be the way to go.