敲竹杠

Explanation: Analogy using other people's weaknesses or something as an excuse to blackmail. 　　Usage: Verb-object type; as predicate, object; containing derogatory 　　Source: Qing Li Baojia "Bureaucrats" 17 back: "Brother rip, can be considered to be knock, do not they here first there is not a bamboo bar?" 　　Examples: "Wood and Records" is a printed version of logs, because the layout of injustice, by printing a large ~, taken greatly. ★ Lu Xun's "Letters To Zhenduo" 　　Riddle: Yu Gu Ta help artists Thesaurus:  rap and rend, racketeering, extortion, Qiao steal take away by force