对待贱人呢一个巴掌就够
[duì dài jiàn rén ní yī gè bā zhăng jiù gòu]
'A slap is enough for a despicable person' suggests that when it comes to a worthless or mean individual, a harsh response is all that’s necessary. This reflects anger or contempt toward certain people. The term has rather a negative connotation.