Person A: Everytime I hear someone talking about updog, I’m torn between not wanting to fall for it and wanting to help them complete their joke.
Person B: Okay, but what is updog?
Person C: Updog is a long sausage in a bun, often served with ketchup, mustard, onions, and/or relish.
Person D: Not, that’s a hot dog. An updog is when a new version or patch of an application is released.
Person E: No, that's an update. You’re thinking of the fourth largest city in Sweden.
Person F: Surely, that’s Uppsala, where’s updog is the giant spider in Harry Potter.
Person A: That’s Aragog. Updog is a symbol conventionally used for an arbitrarily small number in analysis proofs.
Person D: You’re thinking of epsilon. Updog is an upward-moving air current.
Person C: No, that’s an updraft. An updog is the modern version of a henway.
Person B: What’s a henway??
Person A: Oh, about five pounds.