The riff: Chanted by Mike as some of Gumby’s rampaging robots mess up the family’s house with spray paint on the walls.
The explanation: This appears to be a reference to the phrase “Yankee go home,” a popular sentiment over the course of decades in various foreign countries that have adopted anti-American standpoints for one reason or another. Often, the phrase has been used as something of a rallying cry against American imperialism and continued presence in countries like The Philippines.
Novelty factor: It’s all new to me on this one. Note sure how I’ll handle the mental shock of finding out that not everyone likes me by default.