I believe, there was a children's story book or cartoon or both where the father (an elephant or a bear) referred to his child or wife as "my sweet baboo".
What is the origin of term "my sweet baboo"?
The earliest origin I could locate was by Charles Schulz; "my sweet baboo," is the nickname Charlie Brown's sister Sally bestows on Linus in the "Peanuts" cartoon strip.
Happy Holidays!! :o)