noun. A first cousin of giant-ballsitude, testicular fortitude, and balls-of-steel-osity.
Real citation: “During that same campaign, Puller would once again prove his brass-ballsitude by going above and beyond the call of duty in the name of kicking every ass he could find.”
(Badass of the Week, http://www.badassoftheweek.com/puller.html)
Made-up citation: "This job requires moxie, grit, chutzpah, and brass-ballsitude. If you know where to find a calzone that’s not too fattening, that’s a plus."