Big Brother is in the middle of some convoluted story about someone at school. He mentioned that the student in question has a "Napoleon complex." Then he offered to define that term for Middle Sister, who he correctly guessed would not know what that meant.
"...so, you know who Napoleon was, right?"
"Napoleon DYNAMITE! Yeah, I know who he is."
Obviously Middle Sister's grasp on popular culture is better than her grasp of world history.