What's Brad Pitt like?
Oh, he's really friendly and stuff.
What have you got to do tomorrow?
I have to go to work and then clean the flat and stuff.
It's not great English, it's certainly informal. In the example you gave, it almost sounds as if the speaker wanted to follow it with "but..."
North Korea is meant to be really clean and stuff, but I'm still nervous about going there.
Student or Learner