Jump the gun
verb
To do something too soon, especially without thinking carefully about it.
He jumped the gun and sent the email without proofreading it first.

Often appears as...
- jump the gun on
- jumped the gun by
Usage tips
Informal, Disapproving
Idiomatic
verb
In athletics, to start running in a race before the starting gun has been fired.
The sprinter was disqualified because he jumped the gun.

Often appears as...
- jump the gun during
- jumped the gun at the start
Usage tips
Disapproving
Technical
verb
To do something too soon, especially without thinking carefully about it.
He jumped the gun and sent the email without proofreading it first.

Often appears as...
- jump the gun on
- jumped the gun by
Usage tips
Informal, Disapproving
Idiomatic
verb
In athletics, to start running in a race before the starting gun has been fired.
The sprinter was disqualified because he jumped the gun.

Often appears as...
- jump the gun during
- jumped the gun at the start
Usage tips
Disapproving
Technical
Definition 1 of 2

Impulsiveness Caution
The phrase often implies a lack of thought or planning, suggesting impulsiveness.

He jumped the gun on the project and now we have to start over.
Negative Outcome
Using 'jump the gun' usually points to a negative result due to early action.

Jumping the gun led to a misunderstanding with the client.
Metaphorical Use
Despite its origin in sports, the phrase is often used metaphorically in different situations.

Don't jump the gun and assume they will agree to the deal.
Impulsiveness Caution
The phrase often implies a lack of thought or planning, suggesting impulsiveness.

He jumped the gun on the project and now we have to start over.
Negative Outcome
Using 'jump the gun' usually points to a negative result due to early action.

Jumping the gun led to a misunderstanding with the client.
Metaphorical Use
Despite its origin in sports, the phrase is often used metaphorically in different situations.

Don't jump the gun and assume they will agree to the deal.
Impulsiveness Caution
The phrase often implies a lack of thought or planning, suggesting impulsiveness.

He jumped the gun on the project and now we have to start over.
Negative Outcome
Using 'jump the gun' usually points to a negative result due to early action.

Jumping the gun led to a misunderstanding with the client.
Metaphorical Use
Despite its origin in sports, the phrase is often used metaphorically in different situations.

Don't jump the gun and assume they will agree to the deal.
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