不喜欢…，对…有偏见
to dislike someone, often unfairly
Why do you have a down on him? I think he seems really nice. 你为什么不喜欢他？我觉得他非常不错。
He's convinced that one of his teachers has a down on him.
She denied that she had a down on Max when I asked her.
He probably thinks I have a down on his mum, but I think she's lovely.
She's horrible to me. I think she's got a down on me.
See also: downs down noun (DISLIKE)