dirty trick

• 1. 

  N-COUNT You describe the actions of an organization or political group as dirty tricks when you think they are using illegal methods to harm the reputation or effectiveness of their rivals. (政治组织非法的)卑鄙行为 [usu pl]

  例：

  He claimed he was the victim of a dirty tricks campaign.

  他声称自己是一场使用卑鄙手段竞选的受害者。