Frat boy culture, often called "bro culture," centers on intense male bonding, partying (heavy drinking/binge drinking), machismo, sports, and fraternity traditions, but it's also criticized for promoting hypermasculine, sexist, and exclusionary behaviors, sometimes leading to toxic environments, sexual harassment, and hazing, extending beyond colleges into workplaces. Key elements include brotherhood, Greek life rituals, partying, specific apparel, and a strong emphasis on in-group male bonding, often at the expense of outside perspectives.