The phrase "all jaw" is a colloquial American idiom that refers to someone who talks excessively without acting upon their words. The best antonym for this phrase could be "action-oriented" or "results-driven," both of which suggests individuals who are efficient, productive, and take concrete actions to achieve their goals. These people prioritize action over meaningless chatter and understand the importance of delivering tangible results. In contrast to being "all jaw," these individuals focus on practical solutions to challenges and problems. Equipped with a bias for action, they maintain a strong work ethic, stay on task, and make things happen.