To step forward bravely to take on a challenge or responsibility, often in a dangerous situation.
挺身撑直身体。挺直身体站出来。形容面对着艰难或危险的事情，勇敢地站出来。
《旧五代史·周·唐景思传》后数日城陷，景思挺身而出。”
When the building caught fire, he immediately 挺身而出 to rescue the trapped children.
Learn the next connected idiom: 挺身而出 (tǐng shēn ér chū) → 出人意料 (chū rén yì liào)
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