For example, it could be part of a sentence like:
* "Being what you want is important." - Here, "being what" refers to becoming the person you aspire to be.
* "He was being what he thought was funny." - This implies he was acting in a way he thought was humorous, but it might not have been actually funny.
* "Being what we are is not always easy." - This refers to accepting one's true self and the challenges that come with it.
To understand the meaning of "being what," you need to look at the complete sentence and the context in which it is used.
Please provide the full sentence or more context so I can help you understand the meaning.