Dreams often reflect our subconscious thoughts, feelings, and experiences. In your dream, the argument with your dad may symbolize unresolved emotions or conflicts between you and parental figures. Expressing feelings of being treated like a "slave" can indicate a sense of feeling trapped, controlled, or undervalued in your waking life.

The presence of your friend and the reaction of others in the dream could suggest that you are worried about how your words and actions affect those around you, particularly marginalized individuals. This might indicate a fear of judgment or a desire to be more mindful and sensitive to the feelings of others.

The reference to a past event suggests that unresolved issues from your history are resurfacing. It might be helpful to reflect on your current relationships and any lingering feelings you have about them. Consider how you communicate your emotions and the impact it has on those you care about.

Overall, this dream could be prompting you to explore your feelings about family dynamics, responsibility, and the importance of being considerate in your interactions. It may be beneficial to have open conversations with those you trust to process these emotions further.