负乘致寇的英文是「To take advantage of one's defeat to defeat」
fu cheng zhi kou
指居非其位,才不称职,就会招致祸患。
典出《易·解》:“六三:负且乘,致寇至,贞吝。《象》曰:‘负且乘,亦可丑也。自我致戎,又谁咎也。’”