Brigada Verde 1997 is the ultras supporters' group associated with Leça Futebol Clube, a Portuguese football club, and this recording is labelled as coming from the club's first training session in 2014. Rather than a commercial release, it captures a supporters' chant in its natural setting, which is why it has remained a niche fan recording rather than a widely known meme sound. Online, it is mainly shared by people connected to the club and Portuguese ultras culture, who reuse it to give football edits an authentic, local supporter atmosphere that studio chants cannot reproduce.