jump the gun
成語所屬單字gun
jump the gun — 慣用語
1. to do something too soon, before the appropriate time or before all preparations
1.慣用語
釋義
過早行動；操之過急
to do something too soon, before the appropriate time or before all preparations are complete
例句
The company jumped the gun and announced the new phone before it was ready to sell.
Astrid jumped the gun by sending the email before the manager had approved it.