The Clue Bro ___ : friendship rules for guys
The Answer CODE
The answer "CODE" fits the clue "Bro ___ : friendship rules for guys" because it refers to a set of unwritten rules or guidelines that many friends follow. The term "bro code" is commonly used to describe these friendship principles that help maintain loyalty and respect among male friends. It captures the idea of camaraderie and the unspoken agreements that define their relationships. Overall, "CODE" perfectly encapsulates the essence of friendship rules for guys.