Le mot ou phrase en français pour “Yuh-huh!”
In the following English exchange, a strong statement is followed by a disagreement, which is then followed by another disagreement. I’m looking for the colloquial phrase for the last line of the dialogue:

A: That TV show is the best TV show ever!
B: No, it is isn’t.
A: Uh-huh! (Meaning “yes, it is!”)
B: Nuh-uh. (“No, it really isn’t”)
A: Yuh-huh! (“You are so wrong! It is the best.”)

Many languages have an equivalent of this (admittedly immature) exchange. Any know if there is one in the French language? Merci d’avance (et aussi, désolé...)

Question

Le mot ou phrase en français pour “Yuh-huh!”
In the following English exchange, a strong statement is followed by a disagreement, which is then followed by another disagreement. I’m looking for the colloquial phrase for the last line of the dialogue:

A:  That TV show is the best TV show ever!
B:  No, it is isn’t.
A:  Uh-huh!  (Meaning “yes, it is!”)
B:  Nuh-uh. (“No, it really isn’t”)
A:  Yuh-huh!  (“You are so wrong! It is the best.”)

Many languages have an equivalent of this (admittedly immature) exchange. Any know if there is one in the French language?  Merci d’avance (et aussi, désolé...)

Answer

These are always difficult to find an equivalent to :)

I was thinking maybe of "na na na" or "nananère" which is something kids say when they think they've won the argument and the other person is out of counter argument :) usually done along with poking your tongue out... haha... 
If you're interested, maybe this'll have some answers for you:
https://fr.wikipedia.org/wiki/Nanan%C3%A8re