…'s fault
我挑不出他的毛病。
I can’t find fault with him.
他总是挑别人的毛病。
He’s always finding fault with others.
至少你们“改”了他说脏话的毛病
At least you’ve “fixed” his habit of swearing.
— 妈咪 (2014)
老爷惯出来的毛病
A bad habit indulged by the master.
— 大红灯笼高高挂 (1991)
这就是她的毛病
That's her problem.
— 蝴蝶梦 (1940)