Jaime sort of blinked. She'd heard the phrase Earth That Was - River was fond of using it to describe the place (as far as Jaime could tell), but she wasn't sure about a comparison to whatever Mal was talking about.
"I think this is ... that," she said. "I mean, that's what River keeps calling it. Earth that was is earth that is, or something," she quoted.
"I just mean ... like okay, some people here are from the 1970s, right? But they're still from the nineteen hundreds. Robin's from ... like. Eight hundred years before them. So it's a pretty big displacement for him," Jaime elaborated.
Of course, explaining it to him completely distracted her from continuing to flaunt her 'date' with Robin. Once she realized that, she figured the window to jump back onto that path had closed. Oh well. There'd be some other time.