What is the Korean catchphrase 중꺾마 short for?

• 중간에 꺾어서 마무리 (break it off halfway and wrap up)
• 중학생 꺾기 마스터 (master at beating middle schoolers)
• 중요한 건 꺾이지 않는 마음 (what matters is a heart that does not break)
• 중심을 꺾지 말자 (let us not bend the centre)

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