The origin of the word is widely unknown, but popular sources suggest that it is a term used to describe the "Creeping Barrage".
Person 1: "Did you hear about the Creeping Burrig?"
Person 2: "What?"
Often use to describe a state of disorder within a soviet classroom. Or used as a word of disgust regarding work.
For Example:
This class is in a complete state of burrig!
This essay is terrible! Complete burrig!