I have been holding on to this 2000-D Jefferson nickel due its unusual appearance.…

So many people write me with coins that have post mint damage, and copy terms from the Internet. I think in this case, you really do haven error. It's not my specialty, I think you nailed down the type fairly well. It might also be a struck-through grease or some kind of other error. The best way to answer this and verify it is to have it certified; the thing is, you'll probably pay $50 and wait four months for standard service. The coin may not be worth more than that. ICG is an affordable company, maybe go with them if you want to do that and sell it. Or call it what you think it is, you can say I think you got it right!