i have seen the word "Bwana" in alot of people's names and in so
me post's. Can somebody tell me what it means? Sorry if its a stupid question.

It's originally Swahili, means "Father" (affectionately) or "Boss" (not so much). Was (is) commonly used by African staff to refer to either a Professional Hunter or (sometimes) a client hunter.

I always thought it was the PH's way of not calling the client by the wrong name, as every client is "Bawana".

Its a term of respect from an African towards a white person. Like the word "sir".