steal someone's thunder

　　抢某人的风头，居他人之功

　　释义：

　　to do what someone else was going to do before they do it, especially if this takes success or praise away from them 抢某人的风头，居他人之功

　　例句：

　　Sandy stole my thunder when she announced that she was pregnant two days before I'd planned to tell people about my pregnancy.

　　He's a very insecure boss – he's always afraid that his staff might steal his thunder.