清醒耳光
[qīng xĭng ĕr guāng]
'清醒耳光', literally 'Sobering Slap.' People sometimes say when one suffers some shock, it is likened to receiving a ‘slap’. Such a ‘Slap’ awakens one’s senses and makes one sober again. The nickname may express the person being very realistic or having an attitude that helps them remain clear headed through tough moments.