To me, "confabulating" implies deliberately attempting to mislead. I like "bullshit" better -- bullshitting might be lying, but it can also mean simply trying your best in the attempt to please. To the degree that an LLM "wants" something, it's to give you an answer that makes you happy, even if it doesn't know the truth.

The fact that BS is also used for deliberate lying to mislead is a strike against that word. Using "bullshit" and "hallucinate" in conjunction somewhat paint a picture of the quality of the answer you get and the "motivation" used to get there.