"Yankee-kun" is a term often used in Japanese culture to describe a delinquent or troublemaker, typically a young male who exhibits rebellious behavior. The term is commonly associated with characters in manga and anime who have a tough exterior but may possess a softer side. In the context of the popular manga and anime series "Yankee-kun to Megane-chan," the main character, a yankee named Yankee-kun, navigates high school life while dealing with friendships, romance, and personal growth. The series explores themes of identity and acceptance, showcasing the complexities of youth.