What is updog?

Ah, updog! It's a classic.

Updog is a popular internet joke and prank that relies on a simple question-and-response format. The setup involves someone asking "What's updog?" or a similar variation. The unsuspecting person then responds with "What's up, dog?" (or something similar, essentially acknowledging the question). The first person then delivers the punchline: "Not much, what's up with you?"

The humor stems from the fact that the second person is tricked into asking a question that sounds like they're unaware of the supposed "updog." There is, of course, no such thing as "updog." It's purely a play on words designed to elicit a specific response and create a moment of comedic confusion.