Episode Title:
Lisa's Belly.
Episode Description:
Lisa and Bart contract a bizarre infection from an abandoned waterpark attraction, requiring treatment from steroids that cause temporary weight gain. Before they go back to school, Marge says "You're getting chunky" to Lisa in affection, which causes her to be very insecure about her weight. Meanwhile, Bart gets in shape with Jimbo, Nelson, Dolph, and Kearney.
