n. An entertaining but physically demanding sport where one person (originally JimH) stands at one end of the WiffleBall Dome and another person or persons stand at the other end, attempting to strike him with fast-moving projectiles ranging in size from a golfball up to a basketball (some are hit with a baseball bat, others are merely thrown). It is imperative to the game of JimBall to hit/throw the objects with as much force as you can muster, but equally importantly, without malice. If JimH gets tired or cries or begins bleeding profusely, then someone randomly calls out, I'm Jim! and everyone else runs to the other side of the Dome and play continues.