get back at--报复

get back at   (get revenge, get even) 报复，报仇  ============● I am so hurt that I want to get back at him.我受的伤害这么大，我要报复。● When my boy friend broke up with me, I dated his best friend to get back at him.当我的男朋友跟我分手后，我开始跟他最要好的朋友约会以作报复。