The word "bah" is an expression used to show dislike, disapproval, or disdain. It's often used to convey a feeling of annoyance or disappointment. Full definition
When she eventually made her way to Florida, Sherry came to work at BAH in our Kennel Department but, alas, she was so talented there that she attended and graduated from the Veterinary Technician program at St. Petersburg Junior College and became a CVT (Certified Veterinary Technician). (bayshoreanimalhospital.biz)