Backing the salt mines is a phrasal verb that means to work hard or toil endlessly. The antonyms for this phrase are words that convey the opposite meaning, such as relaxing, enjoying leisure time, and taking a break. Some examples of antonyms for backing the salt mines include lounging, chilling out, unwinding, and resting. These words describe a state of being calm, tranquil, and peaceful - the opposite of the stressful and hectic conditions associated with working in a salt mine. Using these antonyms can help us understand the importance of taking care of our physical and mental well-being by finding time to rest and recharge.