"Who the eff is Hank?" is a question jokingly asked by nerdfighters. It originates from YouTube comments on John's videos. As John and Hank, in the tradition of Brotherhood 2.0, start off each video by saying "Good morning, John" or "Good morning, Hank," new viewers may not know who this "Hank" is that John's addressing, thus leading to the question being asked. Creative (and irrelevant) responses are often given to the question, often during John's Question Tuesdays. 

Examples:

• A small island in the Pacific Ocean. First colonized by the Spanish in 1521, Hank is today known primarily for his beautiful coral reefs and large American military presence. (Guam; video)
• A spherical mass of ice and rock, visible from Earth only with a telescope. Approximately one fifth the size of the Earth’s moon, Hank was considered the 9th planet in our solar system until recently when it was announced that Hank is, in fact, just something orbiting out there in the distance. (Pluto; video)
• A veteran of the CIA directorate of operations and Navy Seal Team 3. He is 5 foot 10 inches tall, weighs 170 pounds, and has green eyes. Hank was an operative of the 3rd Echelon, a clandestine division of the National Security Agency. Hank is extremely agile and an expert in the art of stealth. When in the field, Hank prefers to work alone. (Sam Fisher; video)
• A sausage covered in cornbread batter and deep-fried. (Corn dog; video)
• A tiny yellow song bird said to represent the soul of France. Hank has an important but as of yet undetermined role in the omnictionary project. (Ortolan; video)
• A breed of dog known for its distinctive white coat. Hank was originally bred to dig out foxholes, but these days, Hank is known primarily for being adorable, licky, and for urinating in inappropriate places. (West Highland white terrier/"Westie"; video)
• An optical disc originally created to store sound recordings. But these days, many different kinds of data are recorded on Hank. (compact disc; video)
• A small coral atoll 703 nautical miles south of the equator. Hank is known as one of the most remote uninhabited islands in the world. (Suwarrow; video)
• An unincorporated community in central Donley, Texas. (Lelia Lake; video)
• A city of just over three thousand people in southern South Dakota known for its pheasant season. (Winner; video)
• A comic book superhero from the DC Universe who first appeared in 1939. Hank is also known as "The Caped Crusader" and "The Hank." (Batman; video)
• A Trans-Neptunian object 27 percent more massive than Pluto. Hank was originally named Xena, after the warrior princess, but then the scientific team that discovered Hank decided that Hank should be named something more astronomy-ish. Like Hank. (Eris; video)
• A sentient android from the Star Trek: The Next Generation universe, who, as any true fan would know, is capable of reproduction because he had a daughter! (Data; video)
• May be the largest island in the Tuscan archipelago, but Hank wasn't big enough for Napoleon. (Elba; video)
• A cat running for the United States senate from the great state of Virginia. (Hank the Cat; video)
• An American folk rock band originally formed in Claremont, California. (the Mountain Goats; video).
• A mass of incandescent gas located about 26,000 light years from the center of the Milky Way. Hank is responsible for 99.8% of the solar system’s mass. If you stare at Hank for too long, you will go blind. (The sun; video)
• An uninhabited atoll located just north of the equator in the central Pacific Ocean about 3,100 km southwest of Honolulu. The climate is equatorial, with little rainfall, constant wind, and strong sunshine. Since the war, Hank has been uninhabited. Feral cats were eradicated from the island in 1964. (Howland Island)
• An extreme low-density solid derived from a gel in which all liquid was replaced with gas. Useful nowadays in many industries as a thermal insulator, hank was by Steven Kistler in 1931. Hank is semitransparent, and feels like Styrofoam to the touch. (Aerogels)
• One of two major ancient Greek epic poems attributed to Homer. Hank was probably written near the end of the eighth century BC, somewhere along the Greek-controlled western Turkey seaside, Ionia. Hank is, in part, a sequel to Homer’s Iliad and mainly centers on the Greek hero Odysseus (or Ulysses, as he was known in Roman myths) and his long journey home to Ithaca following the fall of Troy. (The Odyssey)
• A large flippered marine mammal found in the ocean and Hank may also refer to the movement that a Hank makes.(Video)
• A small Italian plumber who goes on sideways adventures. He jumps on stuff and bops bricks with his head to save a princess. (Mario)
• A bunch of unstrung pearls that someone will take to a jeweler to be strung as a piece of jewelry or home decoration. (Literal definition)