A Whole Nother. And Yeah, Yeah, It Was a Nother!

Linguist friend says there are two camps. It could have been an infix like, another. And we put whole in the middle. A whole nother. But it also could have been this one linguistic thing that happened a while ago. The word used to be norems. That is so weird. George, what do you know about closed loop pumped hydro? Is that some kind of propulsion system for a submarine?