Who said goo goo goo first?

Deyun Society crosstalk performer Zhou Jiuliang. This is a little joke in the crosstalk works of Zhou Jiuliang and Mr. Meng. At that time, Teacher Meng asked Teacher Zhou if he understood. Teacher Zhou made a small picture: Ah, goo, goo, ga, ga. In fact, Goo Goo Ga originated from an animated film The Boss Baby, which used to prevaricate when playing dumb. Teacher Zhou's quotation here should mean that the characters are pretending not to understand.