A massive turd that sticks out above the water a minimum of 6 inches. Generally takes place following but not exclusive to, a Sunday meal at an Italian grandparents house.
Steveie- Hey Paul how was your night?
Pauly- Uh, I ate Susan's meatballs and then took a gigunda shit.
A bowel movement of extraordinary volume.
Oh, God, I took a gigunda shit after eating too much.