Bro culture is a North American subculture of young people who spend time partying with others like themselves. Although the original image of the bro lifestyle is associated with sports apparel and fraternities, it lacks a consistent definition. Most aspects vary regionally, such as in California, where it overlaps with surf culture. It often refers to a culture of machismo but sometimes also a darker "hyper masculinity" including "binge drinking, sexism, rape culture". Oxford Dictionaries have noted that bros frequently self-identify with neologisms containing the word "bro" as a prefix or suffix.