This entry focuses on the use of homophobic language among adolescents, with attention to its expression within peer groups and within schools. First, the entry provides an overview of the prevalence of homophobic language use, factors contributing to and explaining this behavior, and how it is connected to other serious behavioral concerns. Next, the entry considers homophobic language use within a broader social context, particularly as it is expressed among peers and within friendship groups. Topics discussed include how peers influence and shape this behavior, how group norms contribute to such socialization processes, and how homophobic language use affects individuals and their interpersonal relationships. Finally, the entry notes the implications of this knowledge for continued research and interventions.