when you are at sea with your family, and you put your penis inside your uncles ass and then put it in your sister's mouth. most common in the coasts of Singapore, and oceans around Europe
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"