The Smile Dog is the titular main antagonist of the Creepypasta story Smile.jpg. He is a supernatural entity that haunts the lives of any who see his face, driving them to insanity and suicide. a very aggressive, bloodthirsty, dangerous and sadistic entity who endlessly revels in the terror others have of him. He is seemingly always smiling and only seems displeased if his "request" is not fulfilled by his victim. Smile Dog's only real goal seems to be to spread the fear of him.