“Fat Man and Little Boy” is the title of episode 5 from season 16. In short, Bart begins a graphic tee shop with rude slogans and Homer starts fathering Lisa closer since he’s replaced by Bart as the breadwinner for the family. There’s also a Willy Wonka type character that commercializes Bart’s shirts. Needless to say this episode provides me much material for my shop as well since it’s focused around graphics tees. Here’s one that I don’t recommend wearing to work even as a joke.

Here’s the link to the product as a pin, but you can view the design on multiple items if you’re interested.