The term "planked out" means being exhausted or fatigued. It can be substituted with antonyms such as rejuvenated, refreshed, energetic, revitalized, or invigorated. If a person is not "planked out," he or she typically feels lively, active, and full of life. Some other antonyms for this expression include alert, awake, alive, robust, and well-rested. These terms describe a state of being revitalized and energized, rather than feeling drained and exhausted. By understanding antonyms of "planked out," one can choose more accurate words to convey their energy levels and attitude towards life.