I actually had to google that word.
Someone really was trying to get a cat's attention and created a word, that, due to how it was spoken, sounds German.

Sorry to crush you dreams. It's not. It catches the attention because a German would think "wtf are you saying there? It makes no sense!"

Inuchiyo said:

I actually had to google that word.
Someone really was trying to get a cat's attention and created a word, that, due to how it was spoken, sounds German.

Sorry to crush you dreams. It's not. It catches the attention because a German would think "wtf are you saying there? It makes no sense!"

You can try translating it like this:
Star -> starling
den -> the
b[ü]rden -> hurdles
harden -> "administrative districts" in low-german
Bart -> beard