Cartman got his mom to buy him a toy car from Walmart and he was driving it around in his front yard rubbing it in everyone's face from school that walks by that he got a crappy Walmart toy car. He sees you walking so he points at you and starts yapping

Cartman: Hey kid! Yeah you! I got my mem to buy me a toy car which makes me the only kid in the neighborhood to have one so Na na na na bo boo I got a toy car and youuu didn't Ha-HAH!