brinkmanship
noun [ U ] uk/ˈbrɪŋk.mən.ʃɪp/ us/ˈbrɪŋk.mən.ʃɪp/
（尤指政治上的）边缘政策（指威胁采取极端手段）
the activity, especially in politics, of trying to get what you want by saying that if you do not get it, you will do something dangerous
The talks have collapsed and both sides have resorted to brinkmanship. 谈判失败了，双方都采用了边缘政策。