The Calvin Peeing meme features the lead character from Bill Watterson's 'Calvin and Hobbes' comic strip, though it is famously an unauthorized parody. Originating in the late 1980s as a bootleg car window decal, the image shows Calvin looking over his shoulder while urinating on a logo or text. Despite Watterson's refusal to merchandise his characters, the image became a global symbol of defiance and tribalism, used by fans to mock rival sports teams, car brands, or political opponents. It remains one of the most recognizable examples of bootleg culture and expressive internet humor.