Is there an adjective that describes something that is intentionally useless or meaningless (as a joke or prank)?
For example, an application that doesn't do anything when you click on its buttons, or a very long joke that, upon finishing reading it, turns out to be not a joke but just an open-ended (deliberately) meaningless story.
For the application example, I can precede the word application with prank as an adjective but in the case of the joke, prank joke doesn't sound idiomatic.
Best Answer
There's a term for the joke. From Wikipedia: