MMC in books stands for "Male Main Character." It refers to the male lead in a story, often used especially in romance novels or discussions about characters. The term highlights the primary male character who usually has significant focus and development within the book. It is commonly paired with FMC, which means "Female Main Character." So, MMC simply means the principal male protagonist in the book. This term is popular in genres like romance where distinguishing main characters' genders is common. For example, in romance novels, readers might discuss the story in terms of its MMC and FMC to identify the key romantic leads. This clarification is well established in reading communities and book discussions.