我不伟大只是装英雄
[wŏ bù wĕi dà zhĭ shì zhuāng yīng xióng]
This translates to 'I'm not great, I just pretend to be a hero'. The phrase suggests a modest attitude admitting to having posed as brave, indicating perhaps they acted courageously beyond how they felt inside, possibly masking insecurities with bravery or humor in response to life challenges.