The art of tucking your testicles between your legs and stuffing your own scrotum into your rectum. The final act is farting out the scrotum.
Josh: What are you up to tonight, Bobby?
Bobby: I think Iâm gonna go home, drink a few beers and do a little Stuff & Puff.
Josh: What is that?
Bobby: Iâm gonna stuff my nuts into my ass and fart them out!