What is another word for jumping the gun?
Pronunciation: [d͡ʒˈʌmpɪŋ ðə ɡˈʌn] (IPA) 
There are several synonyms for the phrase "jumping the gun", which refers to making a decision or taking action too soon, before all the facts are known. Some alternate phrases include "acting prematurely", "preempting", "being hasty", or "rushing into things". Other related terms include "assuming", "overreacting", "anticipating", or "jumping to conclusions". Regardless of the specific phrasing used, the key takeaway is to exercise caution and thoroughly evaluate all available information before making any important decisions or taking action. By taking a measured, thoughtful approach, you can avoid the pitfalls of jumping the gun and ensure a successful outcome in your endeavors.
