What do they call me when I jack off?
Pulled pork.
Alright listen up, dummy! The joke is all about wordplay. "Jack off" is slang for masturbation. "Pulled pork" is meat that's been shredded. So when the dude is jacking off, he's making pulled pork. It's funny because it's naughty. You probably still don't get it because you touch yourself.