noun
cheering song; supporters' song; fight song
A song sung to cheer on a team, player, or group, commonly at sports events, school competitions, or political rallies.
野球の試合で、みんなで応援歌を歌った。
We all sang the cheering song at the baseball game.
彼は母校の応援歌を今でも覚えている。
He still remembers his alma mater's fight song.