when the mouth of one person is placed around the butthole region of another and the poop is forcefully sucked out. once the poop is thoroughly in place in the mouth the feces is then swooshed around till it is liquidy and then swallowed in a vortex fashion.
person1: boy I gotta poop but don't feel like pushing.
person2: don't sweat it bro I'll give Hershey vortex!
person1: golly am I lucky to have a pal like you! (while pulling down pants and under pants)
person2: mutual feelings buddy. (while placing mouth around pooper and sucking out feces and then swooshing it inbetween the teeth in order to get the poop as refined as possible and then swallowing in a vortex fashion)