No, it's the episode where Homer tries to gain weight up to 500lbs (I think) to get onto disability, and he's just a pound short. So he eats Playdoh to gain that pound. And it turns out his gut was on the towel bar, and he acutually was well over the limit. So he spent most of his time at home wearing a dress, and ended up saving the power plant in the end by plugging a hole with his body.

Woo. Go Homer.