Nur Nurny Nur Nur?

Does "Nur Nurny Nur Nur" refer to exclamations of a dialect (where?)?

Context:

'Bet you I can prove God exists.'
'Bet you can't.'
'Right then, imagine the most perfect perfect perfect
thing possible.'
'Okay, now what?'
'Now, is that perfect perfect perfect thing real? Does it
exist?'
'No, it's only in my mind.'
'But if it was real it would be even more perfect,
because a really really perfect thing would have to be
better than a silly old imaginary thing. So I've proved that
God exists. Nur Nurny Nur Nur. All atheists are fools.'
I had my childish wiseacre choose the word 'fools' advisedly.
Anselm himself quoted the first verse of Psalm 14, 'The fool hath said in his heart, There is no God,' and he had the cheek to use the
name 'fool' (Latin insipiens) for his hypothetical atheist: