The Word 'Wurd'

I have heard people say 'Wurd'. They use it everywhere and anytime they want. It somehow fits into the context of everyday life....somehow.

I never understood what it means or how i could use it properly without breaking the english rules of grammar, something I really care about haha.

So I thought I'd ask for advice. It turns out the best reason for the use of 'Wurd' is that it is "just something you say." They went on to say "its just like hollering out."

That made me think. Wouldnt Barking be of equivalence?

BARK BARK