Brazilian Jiu-Jitsu (BJJ).
Brazilian Jujitsu, which is often simply referred to as BJJ, is a martial art and combat sport that focuses mainly on ground game and grappling techniques. It was popularized by Helio Gracie and his brothers, who modified Japanese Jiu-Jitsu and Judo to form a unique grappling style.The Gracie family, since then have been responsible for making BJJ a unique art form, teaching it across the world.
The main focus of the art is on leverage and technique, using which a smaller person can dominate submit and a larger and stronger assailant. It is not just a martial art, it is also a sport, a method for promoting physical fitness.