noun
red school PE jersey
Colloquial term for the classic red-colored physical education uniform, often associated with a stereotypical 'uncool' or 'country bumpkin' image. The 芋 (potato) element carries a nuance of rustic, unfashionable, or dorky.
体育の時間はいつも芋ジャージを着ていた。
I always wore the red PE jersey during gym class.
あの芋ジャージ、ちょっとダサいよね。
That red PE jersey is kind of lame, isn't it?