The Bad Blue Boys are a well-known supporter group for the Croatian football club GNK Dinamo Zagreb. Established in 1986, they are recognized for their passionate support during matches and their distinctive blue and white colors. The group has a reputation for creating an electric atmosphere in the stadium, often using flags, banners, and chants to encourage their team. However, the Bad Blue Boys have also been associated with controversial incidents, including clashes with rival fans and law enforcement. Despite this, they remain a significant part of Croatian football culture, embodying the loyalty and fervor of Dinamo Zagreb supporters.