What is what does it mean when a guy calls you kiddo?

When a guy calls you kiddo, it could mean several things. Depending on the context and the relationship you have with him, it could indicate that he sees you as younger or less experienced than him. It could also be a term of endearment or a way to express a paternal or protective attitude towards you. However, it's important to note that "kiddo" could also be considered condescending or demeaning in certain contexts, especially if you are not comfortable with being referred to by that term. Ultimately, it's best to pay attention to the way the person says it and their body language to better understand what they mean.