Neither here nor there means not relevant to the point being discussed. That is neither here nor there.
It dismisses a fact without denying it, which is a useful and slightly brisk move. It is said about an argument rather than about a person.
1phraseneither here nor thereNot relevant to the point being discussed.
“What it cost is neither here nor there if it does not work.”
neither here nor there is a phrase.
Practised in Idioms