a Japanese system of wrestling in which knowledge of anatomy and the principle of leverage are applied so that the strength and weight of an opponent are used against him or her
See jujitsu in American Heritage Dictionary 4
also ju·jut·su or jiu·jit·su or jiu·jut·su(jo͞o-jĭtˈso͞o)
noun
An art of weaponless self-defense developed in Japan that uses throws, holds, and blows and derives added power from the attacker's own weight and strength.