* A nonsensical word: Similar to "blah" or "bam", it's used as a placeholder or to add emphasis.
* A slang term: In certain contexts, it might be used as a shortened form of "bazooka" or "bazillion".
* Part of a phrase: Sometimes it appears in phrases like "bazinga" (made popular by the TV show "The Big Bang Theory") or "bazillion" (meaning a very large number, not a real number).
Without context, it's difficult to determine the intended meaning of "baz". If you provide more information about where you encountered this word, I can help you understand its meaning.