The antonyms for the phrase "most namby pamby" are rugged, tough, hardy, strong, sturdy, and sturdy. These words suggest resilience, grit, and determination that can endure tough times and difficult circumstances. They connote a sense of fortitude and bravery that oppose any notion of weakness or vulnerability. They imply a readiness to face challenges head-on and tackle them with vigor and resolve. Rugged and tough, especially, suggest robustness and stamina that can withstand anything thrown its way. Whatever the context, these antonyms represent a welcome contrast to the notion of being namby-pamby.