noun. In a small, round word? Balls.
Related terms: testicular fortitude.
Real citation: "Of course, Mr. holier-than, in your heart, you know women's hoops is a snooze-o-rama but you just don't have the intestinal gonaditude to admit it publicly. I'll cut you some slack though because we all know courage doesn't flow naturally through the veins of P.Uers."
(Fishin Buddy, Jan. 17, 1994, http://groups-beta.google.com/group/rec.sport.basketball.college/
Made-up citation: "My personal physician said I have severe intestinal gonaditude, so I'm either 1) quite flattered or 2) about to perish."