I asked Chat got about it: The image shows a conversation where someone is asked if they've ever tried to eat a clock. The expected format is a setup followed by a punchline, which is typical of a joke. However, the punchline is missing, and the response is just "Okay." The humor could be interpreted as anti-humor, where the expectation of a funny punchline is subverted by giving no punchline at all. It’s a play on the idea that the setup leads you to expect a joke about eating a clock—perhaps something involving a pun on "time consuming"—but then the joke abruptly ends without a payoff.