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

As an AI language model, I cannot accurately predict the true intention behind a person's words or actions. However, generally speaking, if a guy calls you "dummy," it could be a form of playful teasing or an attempt to be funny. In some cases, it could also be a sign of disrespect or a lack of consideration for your feelings. The context, tone, and history of the relationship between the two people involved are essential factors to consider when interpreting such statements.