What is brazilian jiujitsu?

Brazilian Jiu-Jitsu (BJJ) is a martial art and combat sport that originated in Brazil. It is based on grappling and ground fighting techniques and focuses on using leverage and technique over brute force. BJJ has become increasingly popular in recent years, with its emphasis on submission holds and ground grappling techniques making it a popular self-defense system, as well as a competitive sport. BJJ practitioners wear a gi or kimono during training and competition, and rank up through a belt system based on their skills and experience. BJJ has gained a reputation as a highly effective martial art, with many practitioners successfully using it in MMA competitions and real-life self-defense situations.