He's what is known as a "bellyacher"--- he's always complaining about something.
他就是人们所说的&牢骚鬼&---永不停歇地发着牢骚。
Bellyacher:无病呻吟的人
Hair-clippers 发卡 | Bellyacher 无病呻吟的人 | Chinese knot 中国结