Goo goo ga ga is one of the oldest written imitations of baby talk in English, used for generations by parents, comedians and cartoon characters pretending to be infants. The phrase copies the cooing and gurgling sounds babies make before they learn words. Online, the short babble clip spread through meme edits and soundboards as a quick reaction sound. Creators drop it whenever a person, animal or fictional character needs to look helpless, innocent or hilariously out of their depth, which is why it keeps resurfacing in prank and reaction videos.