1
general::
Unimportant, irrelevant, as in You pay for the movie and I'll get the dinner check, or vice versa? it's neither here nor there. This expression was first recorded in 1583. Also see BESIDE THE POINT.
American Heritage Idioms
2
general::
Phrase(s): neither here nor there Cliché of no consequence or meaning; irrelevant and immaterial. • Whether you go to the movie or stay at home is neither here nor there. • Your comment—though interesting—is neither here nor there.
McGrawhill's American Idioms And Phrasal Verbs