one who looks normal (but is actually complete normal, or has a evil mind)
Definitions (粵典–words.hk)
形容詞
形容一個人正正常常、合乎社會嘅期望 a person of good standing; a normal and reputable person; a good citizen
佢好人好者，點會加入黑社會？
佢好人好者，点会加入黑社会？
keoi5 hou2 jan4 hou2 ze2, dim2 wui5 gaa1 jap6 haak1 se5 wui2? He's a person of good standing, why would he join a triad?
好人好者就唔會晚晚落bar蒲到天光啦。
好人好者就唔会晚晚落bar蒲到天光啦。
hou2 jan4 hou2 ze2 zau6 m4 wui5 maan5 maan5 lok6 baa1 pou4 dou3 tin1 gwong1 laa1. A reputable person wouldn't party in bars until dawn every day. (Thus, he or she is not a good person.)