Would Be a Whole Nother?

If you haven't already guessed, the 'nother in “a whole 'nother” is the word another with its initial vowel sound omitted. Taking something to “another level” or “the next level” means to do better than average. It's a compliment that indicates that whatever or whomever is being praised is the best yet.

Is it correct to say a whole nother?

It's simply taking "another" and putting "whole" in the middle as if it was originally "a nother kettle of fish", which of course we know it's not. The correct version is simply "a whole other".

What does a whole nother mean?

US, informal. : completely different That's a whole nother story/issue.