Here's what we know:
* Bugaboo: In English, a bugaboo is a fear or a source of anxiety, often a childish imaginary monster.
* Cajun Culture: Cajuns are known for their rich culture, lively music, and spirited language. While they may use some unique words and phrases, "bugaboo-boo" is not a recognized term in Cajun vocabulary.
It's possible that "bugaboo-boo" is a nickname or a playful term used by someone in a particular group, but it's not a common or widely recognized Cajun word.