On NBA 2K10, when a player makes a difficult shot or a 3-pointer, the person playing says this phrase upon release of the shot, giving the shot a greater chance of going in.
To hit a homerun; first introduced by Atlanta Braves thirdbaseman Chipper Jones via his July 25th tweet: "Mike b and jhey go yicketty! The roadrunner went mammo! And the Bravos have a winning road trip" and then clarified a later, "yicketty means homer! mammo means big bomb"