Gully-digger

A gully-digger (prn. Gul-lee- dig-aa) is a slang term from Australia for one's stomach or digestive system. It stems from use in the Australian Army, when Soldiers were extremely hungry during or after a training event (hence the use of the Australian slang term for a Soldier- "Digger."

I'm going to go stuff my gully-digger I'm so hungry.