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Someone fanatical about training Brazilian Jiu Jitsu in the gi.

A gihadist may: 1)Only train in the gi, 2)Obsess over gi tournament rules, 3)Tell you that you can't get good without training in the gi.
I asked Sensei Charles if he wanted to roll so I could test out my leglocks, but he's such a gihadist that he said "Sorry I'm training for an advantage only tournament."
by Josh Wexler June 10, 2018
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