have it in for someone
to be mad at someone; to wish to harm someone. Jane seems to have it in for Jerry. I don't know why. Max has it in for his old girlfriend since she broke up with him.
have it in for
Intend to harm, especially because of a grudge. For example, Ever since he called the police about their dog, the neighbors have had it in for Tom . [Mid-1800s]
have (got) it in for
have a particular dislike of someone and behave in a hostile manner towards them. informalhave it in for, to
To hold a grudge against. The it in this expression presumably means bad things in store. The term became especially common in popular novels of the first half of the twentieth century. “I have had it in for that dog since the second Sunday,” wrote P. G. Wodehouse (Meet Mr. Mulliner, 1927).