Fanchants are a long-standing part of K-pop concert culture, where audiences learn set chants for each song and perform them together in time with the music. For BTS, whose fans are known as ARMY, these chants became a signature part of live shows and fan-recorded concert clips shared online. As those clips spread through social media and fan edits, the chant itself became recognisable even outside the arena, and creators now reuse it to signal fandom, excitement and belonging in videos about the group.