The phrase references apparel displaying support for the Philadelphia Eagles, a professional American football team. Typically, such a garment features the team’s logo, colors, or related imagery, often accompanied by the rallying cry “Go Birds!” These shirts function as a visual declaration of allegiance to the team. An example would be a green t-shirt prominently displaying the Eagles’ logo and the phrase used to express enthusiasm during games.
The prevalence of these items highlights the strong connection between the team and its fan base, representing civic pride and community spirit. The widespread use of these shirts transcends mere fashion; it signifies a shared identity and collective enthusiasm. Historically, the association between sports teams and branded merchandise has strengthened, becoming a significant cultural phenomenon.