It means that Crayon Shinchan is a fictional cartoon character, and there is no role of "Crayon Dad", so calling himself "Crayon Dad" is just a joke or self-mockery. "Crayon Dad" is a network language, which comes from a funny line in a video, "Is Crayon Shinchan your son? No, then you are father crayon. " Later, this sentence was used by netizens as a kind of ridicule or self-mockery, to describe some people who think they are very powerful or capable, but in fact they are not, or to ridicule some ignorant and self-righteous people. Therefore, "crayon dad" has become a popular online term, which often appears in various social media and online discussions.