What is what does it mean when a girl calls you dummy?

Without additional context, it is difficult to determine the exact meaning behind a girl calling you "dummy," as the term can be used in a variety of ways, depending on the speaker's tone, relationship with the recipient, and the context of the situation. In some cases, calling someone "dummy" can be playful or teasing, suggesting that the person in question is being silly or foolish. In other cases, the term may be used more aggressively, indicating frustration, anger, or annoyance towards the recipient. Ultimately, the best way to understand the meaning behind being called "dummy" is to consider the larger context of the relationship and situation involved, and to potentially ask the girl directly what she meant by the term.