An act of foreplay, conducted during sexual intercourse, whereby one of the love makers inserts their fist into the other's rectum whilst they defecate.
Dude, we totally made a handburger and she like ate it down like a good gran'ma.
A handburger is a culinary masterpiece made from the shredded remains of an animal, crafted by a man with only the implements God has given him. It is the Ultimate Man's meal: a chunk of meat, inlaid with whatever he deems necessary, shaped however he pleases, and seared over the hot coals burning in his soul.
Serve it on a bun or directly by hand.
Frozen hamburgers? We only eat handburgers, here.