Affectionate term for the Australian combat soldier. The term originated during the Gallipoli Penisula campaign, where digging protective trenches was a comonplace activity.
A person so large that fat hangs over thier genitals. The term digger comes from the act of digging through the fat to get to the gentitals while hooking up with a fatty.
Oh man Sami was such a digger, I had to move like four fat rolls to get to her pussy.