Mou kei

Mou kei was one of the nine marks of lightsaber combat. It was a single blow, often circular, which removed multiple limbs at once. Most Jedi reviled it, viewing mou kei as a hideous, torturous attack which destroyed an enemy without killing him. For that very reason, many Sith preferred to employ the move when possible.

Notable uses
The most famous mou kei occurred in 19 BBY, when defeated  with a mou kei strike on.

Though many Centurions eschewed mou kei, Rajj-Yo often used it in battle.