Prior to the 1980s, girls were completely excluded from research on childhood aggression, presumably because their ‘sugar and spice and everything nice’ made them averse to aggression. Not only were girls missing from research, their voices are frequently absent in current ‘girl aggression’ discourse. Despite this, ‘mean’ girls have received growing attention, especially in psychology. Besides conclusions that boys and girls aggress differently, much work has only offered a means of labelling, identifying and further problematizing girls’ so-called mean behaviour. This book moves beyond the superficial to explore the social context of mean behaviour. It examines the intersection among structures of class, race and gender in the production of girls’ aggression and draws on first-hand knowledge and experiences for a candid glimpse into a culture that raises critical questions about our ‘taken for granted’ knowledge of girls’ meanness.