There are various antonyms available for the phrase "sat on one butt," including being active, energetic, and lively. Instead of sitting still, one could engage in physical activity or exercise, such as jogging, dancing, or doing yoga. Another opposite could be being productive, such as working on a project, completing household chores, or studying. Socializing and interacting with others is another antonym for sitting still, such as chatting with friends, attending a party, or participating in group activities. These antonyms help promote a healthy and engaging lifestyle and prevent stagnation from sitting for extended periods.