Internet Meme
A short segment of the episode features Bill Cosby asking a child on his show Kids Say the Darndest Things about a specific hobby, of which the child promptly replies "Pokémon!" Cosby begins incoherently rambling about what Pokémon is whilst flapping his ears. This is a parodied mannerism of Cosby's that is often used on the show. This is also the second time Cosby has been parodied on The Simpsons. Another similar gag was used in the episode Helter Shelter.
This sequence involving Bill Cosby's over-exaggerated mannerisms from this and other episodes on The Simpsons (as well as the Family Guy episode "Brian Does Hollywood") became an internet meme when many parodies on these particular segments became internet memes in their own right, especially on YouTube and YTMND.
Read more about this topic: Children Of A Lesser Clod