don't give up the day job that’s an expression which means someone’s not very good at doing something and isn’t likely ever to be successful at doing it 这是个短语表达的意思是某人并不擅长做事情，并且不会在这方面取得成功。 A: Hey. What do you think of my acting? I'm gonna be a famous actor. 嘿，你觉得我演技咋样?我会成为一个明星! B: Well, don't give up the day job! 额，别浪费时间了。