A Jedi Weapon Master was a title given to those Jedi Masters who pursued the study of exotic weapons under the distinct schooling division known as the Jedi Guardian.
Some of the greatest fighters of the Jedi Order, they had existed for many centuries though were few in number. While the title had been formally distributed before, it wasn't until Guardian Jedi aceCrix Sunburris described the qualification of becoming a specialist in his contribution to the text of The Jedi Path: A Manual for Students of the Force.[1]
Setting aside their lightsabers, Weapon Masters would spend years of study, honing their skills in the art of their chosen weapon. Becoming highly skilled in their art, they were well respected within the Order and without. Mastering the use of either a double-bladed lightsaber, lightsaber pike, quarterstaff, San-Ni staff, whips, or flails, was all that needed to be done to be considered a Weapon Master by the Jedi High Council. Additionally, ranged weapons and the use of ones body as a weapon are sufficient to receive this recognition.[1]
It also appeared in the video game Star Wars: Knights of the Old Republic II: The Sith Lords, where it is one of the six prestige classes open to a level 15 character, and one of the three light side choices. In the game, the class corresponds to the class Sith Marauder, as both focus on their own strength with a blade, and are more fit for heavy combat than the other prestige classes available: Sith assassin, similar to Jedi Watchman - and Sith Lord, akin to Jedi Master.