I have never understood this line. Why did Mr. Universe say this? Is it just some goofy thing or does he mean, perhaps, that after the huge fight, she would be tired?
EDIT: Maybe it is just the punctuation, verbally, that threw me -- If he said it like "Which she would be: sleepy." The comma after the "which" -- that's how he said it -- was weird.
Now if he had said, "Of course, she would be sleepy." I would not have asked the question.
But the cool thing about Firefly is how they suggest language would change -- I loved the occasional Mandarin thrown in, iirc at least sometimes without subtitles. And words like "shiny" -- maybe there are some other examples.
And perhaps this strange way of saying stuff was a deliberate attempt to show how language had changed -- maybe even a professional linguist as technical adviser suggested this.