speak for yourself idiom informal
（用于表示不同意某人的观点）那是你自己的看法，我不是那样想的
something you say to someone to say that the opinion that they have just expressed is not the same as your opinion
"We had a really boring trip." "Speak for yourself! I had a wonderful time!" “我们的旅行可真没劲。”“我可不这么想！我玩得很开心！”