Ba zin ga (buh-ZEENG-ah), interjection,
1. A chemical compound of Barium, Zinc and Gallium, as represented in a mug sold on the web site Neurons Not Included, www.neuronsnotincluded.com, Allen, Texas, 2013.
2. A seven-stringed harp, as referenced by author Will Cuppy in his book "The Decline and Fall of Practically Everybody." Dorset Press, New York, 1950. It is important to know that the fabrication of the term preceded "The Big Bang Theory" by about 60 years.
3. Ask Dr. Sheldon Cooper.