Used during beer pong, this term describes a cup that has water or beer beneath it, which causes it to mysteriously slide when hit by a ball (See ghost cup). Because the cup usually diverges from the original formation, it becomes a maverick cup, thus becoming a John McCain cup due to the fact that McCain is the original Maverick. A second cup that goes rogue is called a Sarah Palin cup.
by Murky Waters September 6, 2008