S1·E22 – Sticks and Stones

Nicknames can hurt. And Lisa and Corduroy find out while they are in during exuberant play. Lisa takes to calling Moppy "Sloppy Toppy", Moppy takes to calling Lisa "Lisa Pizza", Corduroy takes to calling Buckaroo "Stuckaroo", and Buckaroo takes to calling Corduroy a "boo-boo head".