The phrase "be uptight" refers to a state of tense or anxious behavior, often accompanied by a feeling of unease or nervousness. Antonyms for this phrase would include adjectives such as relaxed, calm, composed, easygoing, carefree, and laid-back. It is important to note that being relaxed or laid-back does not necessarily mean being careless or lazy, but rather having a sense of ease and confidence in handling situations without feeling overly stressed or burdened. By embracing these antonyms, we can cultivate a sense of inner peace and resilience, allowing us to approach life's challenges with a positive and grounded attitude.