If you say that something or someone is overrated, you mean that people have a higher opinion of them than they deserve.
例句
More men are finding out that the joys of work have been overrated...越来越多的男性认识到工作并没有预想的那样有乐趣。If you consider him a miracle man, you're overrating him.如果你认为他能创造奇迹，那你是高估他了。