Here are some possibilities:
* "Boss" misspelled: This is the most likely scenario. "Bawseh" could be a playful or casual misspelling of "boss".
* Slang term: It might be a slang word specific to a particular region or group of people. Without more context, it's impossible to know what it means.
To get a better understanding, please provide more context:
* Where did you hear this word?
* Who used it?
* What was the situation?
With more information, I can help you figure out what "bawseh" means.