It seems to be a pun with "no".

I may see reason in it, but certainly no rhyme.

https://www.mundmische.de/bedeutung/16774-Nee_ne

Das hier funktioniert nicht, oder?

"Kräh, ne? Das hast du nicht wirklich gemacht?"

"Och kräh, ne?"

:-)))

(re #3)

Mattes, genial :)

Danke euch!

Could be a play on the pantomime line, like "Oh no you didn't!"

https://www.alexjacksonpantomimes.com/a-begin...

Isn't it just what a crow would say instead of "Oh man!"

Guess it depends whether it's a crow speaking or a Brit :)