metajoke
A metajoke is a joke that treats humor itself as the subject. It is a self-referential form in which the joke comments on its own structure, the expectations of the audience, or the conventions of joke-telling. The term combines meta- with joke, signaling a level of reflexivity beyond a standard setup-and-punchline.
Meta-jokes may break the fourth wall, acknowledge the act of joking, or deliberately subvert the usual sequence
Metajokes appear across media including stand-up, literature, television, film, and online communities. They are often associated