He's Too Sexy For His Fat

Plot:

Thanks to Brian's embarrassing flea problem the Griffins move into a hotel while the house is fumigated, and Lois and Peter discover that Chris has been skipping gym class because he's self-conscious about his body. Peter tries to talk Chris into getting liposuction, Lois starts preparing him special low-fat meals and Stewie taunts him by eating everything in sight and packing on the baby fat.