Blurber

noun: Mindless nonsense; nothing of importance.

Tasha: I went to the store, and there was a cat, but then I had to buy bread.
Katie: What are you talking about?

Tasha: Nothing, just blurber.

blurber

To blurber is to make up a word that sounds real and that people understand in context despite the fact that the word isn't real.

Negotiations broke down when one of the delegations descended into blurberism.