Seems like it's a technical term, a bit like "hallucination".
It refers to when an LLM will in some way try to deceive or manipulate the user interacting with it.
There's hallucination, when a model "genuinely" claims something untrue is true.
This is about how a model might lie, even though the "chain of thought" shows it "knows" better.
It's just yet another reason the output of LLMs are suspect and unreliable.