It's a parody of a children's rhyme, those sit-in-a-circle-and-clap games little kids play, like patty cake. This one involves naming all the barnyard animals and the sounds the make. It's silly, but not any more "WTF" than if Lady Gaga did "Old MacDonald Had A Farm," with backup dancers doing the "moo moo here, and a baa baa there," etc.