高こう校こうデビュー

noun

high school debut; reinventing oneself upon entering high school

Colloquial, often derogatory. Refers to someone who changes their appearance, personality, or social behavior when starting high school, usually to become more outgoing or popular.

• 彼かれは中ちゅう学がくのときは地じ味みだったけど、高こう校こうデビューして急きゅうに明あかるくなった。

  He was plain in middle school, but he had a high school debut and suddenly became outgoing.

• 高こう校こうデビューに失しっ敗ぱいして、クラスで浮ういてしまった。

  My high school debut failed and I ended up not fitting in with the class.