Your dream contains several intriguing elements that can be interpreted in various ways. Here are some insights into the symbols and themes present in your dream:

1. Family and Social Connection: The party at a family member's house suggests a desire for connection, support, and bonding with your family. It may indicate that you value your relationships and seek to strengthen those ties.
2. Secret Basement: Discovering a secret basement can symbolize uncovering hidden aspects of yourself or your family dynamics. Basements often represent the subconscious or repressed emotions. This might be a prompt to explore deeper feelings or unresolved issues within your family or yourself.
3. Ordering Subway and "Brainrot Chips": The act of ordering food may signify a need to nourish yourself—physically or emotionally. The unusual item, "Brainrot Chips," might represent a playful or humorous take on how you deal with stress or overwhelming thoughts. The combination of flavors could suggest a mix of experiences or feelings you're currently navigating.
4. Living Room Renovation: Helping with a renovation signifies a desire for change or improvement in your life or relationships. It could reflect your willingness to contribute to family dynamics or personal growth.
5. Eating the Chips: Consuming the chips with mixed flavors may indicate that you're trying to embrace complexity in your life. It suggests an acceptance of various emotions and experiences, recognizing that life is not just one flavor or aspect.

Overall, this dream may reflect themes of family connection, exploration of deeper emotions, and a desire for change and nourishment in your life. Consider how these elements resonate with your current circumstances and feelings. It may be beneficial to explore your relationships and any hidden emotions that need attention.