No. It’s not bunk. Not one constitutional scholar or lawyer subscribes to that definition. In fact, no one outside the birther movement believes that definition.
Well, first of all you are wrong. There are plenty of Constitutional Scholars who subscribe to that definition. Even the Heritage Foundation has a paper on it.
George Will has an article on it. Ann Coulter has an article on it. Herb Titus, Lawrence Solum, Edward Erler, and so on. (Not going to bother posting links. You will just ignore them.)
So now that you've been proven wrong, will you shut up? Not a chance. I expect you will just become more strident.