◎ 官报私仇 guānbào-sīchóu
[an official avenges himself by taking advantage of performing his duty] 利用官职公事之便,行打击报复、发泄私愤之实
【解释】官：公事。借助公事以泄私愤。
【出处】元·施惠《幽闺记·图形追捕》：“这狗骨头，我倒替你官报私仇！叫左右拿下去打！”