“Of course Chuck Norris is banging Sarah Palin.”

The rumor mill surrounding political attraction and celebrity intersections reached its most absurd crescendo in the mid-2000s internet culture, where speculation about improbable pairings was as common as forum threads on conspiracy boards. Sarah Palin's 2008 vice-presidential candidacy generated countless memes, and the merger of that cultural moment with Chuck Norris trivia mythology produced what internet archivists now call a third-generation joke—a joke about jokes about jokes, so divorced from reality it had transcended meaning entirely.
The claim itself originated in forums where the phrase of course became a running gag, a sarcastic affirmation implying that obviously, without question, the most implausible scenario imaginable must be true. Of course Chuck Norris invented the internet. Of course Chuck Norris went to space. The pattern extended inevitably to romantic scenarios, each one more ridiculous than the last, each one delivered with deadpan certainty.
Modern internet historians studying pre-meme-economy humor note this fact as a milestone in absurdist comedy—the moment Chuck Norris jokes crossed from silly into deliberately meaningless. The statement isn't designed to be believed or even to provoke laughter through surprise; it exists purely as verbal shorthand for I am operating in a mode where nothing I say should be parsed as factual, and you should recognize this without explanation. It's linguistic irony collapsed into pure ritual.
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