Jailhouse Rock, often known as JHR, is a distinctive form of urban martial art that originated within the prison system. This unconventional martial art is characterized by its unorthodox techniques and improvisational nature. In Jailhouse Rock, practitioners, known as “Jailhouse Rockers,” adapt to their surroundings and use their creativity to develop effective self-defense techniques. It is often described as a “jailhouse style” of fighting due to its origins within correctional facilities.