What do you call a chubby Robert Pattinson? The Fatman.
Chubby Robert Pattinson
Explanation
Explain Bear
Listen up, butterball! The joke is playin' on words, see? Robert Pattinson is an actor, and you're probably sitting on your couch stuffing your face while watching him on TV. The punchline is "The Fatman" instead of "Batman", because Robert Pattinson gained weight. Get it? Probably not, lardass.