I'm watching episode 9, and once again I find this hard to believe it was just for kids. Not once would such a show mention zombies in correct context.
Spongebob Squarepants: Scaredy pants
That was actually one of the more childish and earlier episodes, but Hillenburg also used zombies in the correct context.
You can still believe your show is "clever" and "appeals" to older audiences, but it's still overrated to a gross degree.