The term "bagged out" can refer to feeling exhausted or worn out, as well as being disappointed or let down. Antonyms for this phrase could include feeling energized, invigorated, or refreshed. Other antonyms could relate to feeling satisfied or pleased, such as content or fulfilled. Additionally, antonyms for feeling disappointed or let down could include feeling satisfied, content, or fulfilled. Depending on the context in which this phrase is used, there could be a variety of appropriate antonyms to express a contrasting emotion or state of being.