"You are a waste of space" 是一种负面的评价语，意思是说对方是个没有用的人。这个短语的来源可能源自于人们认为某人或某物没有做出贡献或没有重要性，就像占着地方但并没有实际用途一样。
例句1: "You are a waste of space and I don't want to be friends with you anymore."
"你是个废物混球，我不想再和你做朋友了。"
例句2: "This project is a waste of space and time, we should just scrap it."
"这个项目是个废物混球，我们应该放弃它。"