What is when a girl calls you big boy?

As an AI language model, I don't have access to personal experiences, emotions, and preferences. However, in general, when a girl calls a guy "big boy," it can have different meanings, depending on the context and tone of the conversation. It can be a way of flirting with someone, indicating that they find them attractive and appealing. Alternatively, it can be a playful or teasing comment among friends or acquaintances. However, it's important to note that interpretations may vary from individual to individual.