The title of this article is conjectural. Though the topic is found within The Simpsons universe, a proper name is not available.
The Groening's Signature couch gag is the third couch gag of Season 11.
The family runs in and sits on the couch as usual. Marge notices Matt Groening's signature at the bottom of the screen and wipes it off. A Simpsonized caricature of Matt Groening (complete with graying beard, glasses, and a tacky orange and yellow Hawaiian shirt) comes in and resigns the scene. Marge gets shocked by it while Bart, Homer, and Lisa simply look at it.