Mastaba is a form of Jaffa martial arts, which apparently relies on acrobatic moves based on the lower body. It is somewhat similar to the Tau'ri martial art of Capoeira. It was used by the Jaffa who served Imhotep and knowledge of this fighting style was mandatory for all of Imhotep's Jaffa. It was later taught to the Jaffa rebels on Cal Mah, becoming a somewhat trademark form of combat among their ranks. In 2002, Imhotep, who took a human host and pretended to be his own Jaffa First Prime, K'tano , he used Mastaba skills to defeat Teal'c during Joma secu in a scene very reminiscent of Worf and Gowron in DS9. If it weren't for Teal'c using a broken Bashaak, Imhotep would have killed him. (SG1: "The Warrior")
Trivia
The word "Mastaba" may refer to a type of Ancient Egyptian tomb, probably due to the fact that this kind of structure was used as a tomb for pharaohs before the historical Imhotep had designed the first pyramid for the necropolis at Saqqara, which was essentially made of smaller mastabas topped over larger ones, as opposed to later buildings, which were truly pyramids from a geometrical point of view.