Burr or Burrr or Brrr is a sound that is being used to describe a general state of confusion or otherwise is used to fill any akward pauses in conversation. The sound's usage is currently increasing exponentially in the US office scene. Origins of the sound are still debatable although it has been rumored to have been created in New York. Also can have comedic uses.
While sitting in your boss's office, you're told to do something you don't undertand. You look back at your boss while tilting your head at appoximately 37 degrees and reply..."Brrrr?"
When one drops a loaf and flushes it away but it hides around the corner. Over the course of the next few minutes the log gives the clean water an orange hue ready to greet the next user.
Hey man, I don't think your dump from earlier made it all the way off the premises. I just went for a piss and was greeted by a nice Waterloo Sunset.