Originates from the carefree innocent love and romping play that puppies indulge in before they "know better."
sleeping with your friends like a pile of puppies, all in one bed and on top of eachother.
'Leona' - "we're out of beer! Let's go make a puppy pile!"
'JoJo' - "That sound's amazing! What's a puppy pile?"
'Leona' - "You, Z, your husband and I go crash in you'r bed!"
a puppy-pile is the attempt to either hold the person being dragged away down, or to suddenly create a mass tangle of bodies, in the hopes that the cops simply fuck off and let you to your democratic right to either protest, or dissent.