"Cooled out" is a slang term that is used to describe someone who is relaxed or calm. The antonyms for cooled out are words that describe a person who is agitated or tense. These words include agitated, restless, anxious, nervous, uptight, and stressed. When a person is feeling these emotions, it may be helpful for them to engage in activities that can help them to unwind and relax. Some examples of these activities might include meditation, deep breathing exercises, or taking a walk outside. By taking steps to reduce stress and anxiety, individuals can learn to keep their emotional state cool, calm, and collected.