Jump the gun 过早行动
Jump the gun [dʒʌmp][ðə][ɡʌn]
Amy jumped the gun and announced the news before the company wanted her to.
公司尚未允许之前，Amy 就贸然宣布了这个消息

Don’t jump the gun. I haven’t got the promotion yet.
I know, but I really hope we can buy a new house. 别高兴得太早，我还没升职呢。
我知道，但我真的希望可以买新房子。 promotion[prə'moʃən] [prə'məʊʃn]n. 提升