This paper debates the matter of ethnic teasing employed by a teacher and his students in a multiethnic classroom of a German middle school. The teacher and his students exploit the resources of the racist discourse for multiple in-group rituals. Based on a school ethnography and conversation analysis, this case study attempts to interpret the teasing practices, which are performed in a classroom where ethnicity matters greatly. The teasing interactions here, questioned in the local context, seem to be a part of a working consensus, helping to regulate interpersonal relations in class. These vague and risky practices infringe the politeness norms: they are based on a daily face-attack ritualization through which a partial weakening of the discriminatory effect might be achieved.