Gender, ethnicity, and weight issues are often the basis for internalized oppression. Mexican American women with eating disorders are subject to such internalization, complicated by cultural and family factors. Mexican American women (n ¼ 136) were assessed. The resulting culturally discrepant gender identity theory describes the complicated set of relationships between weight, cultural weightism, gender identity, assimilation to U.S. culture, family factors, and eating disorder symptoms. Therapists treating eating disorders should consider ethnic and gender identity in addressing the conflicts between family, culture, and gender expectations; and demonstrate sensitivity to the complex intergenerational relationships in Mexican American families.