jump the gun
To begin a race too soon, before the starting gun goes off.
Unperturbed when an overanxious opponent jumped the gun in the women's 60-yd. dash, willowy Wilma Rudolph exploded perfectly from the starting blocks.
jump
UK /d͡ʒʌmp/ US /d͡ʒʌmp/
noun 6verb 5adv 1adj 1name 1
Definitions
verb
1
To propel oneself rapidly upward, downward and/or in any horizontal direction such that momentum causes the body to become airborne.
The boy jumped over a fence.
Kangaroos are known for their ability to jump high.
2
To cause oneself to leave an elevated location and fall downward.
She is going to jump from the diving board.
3
To pass by means of a spring or leap; to overleap.
to jump a stream
4
To employ a parachute to leave an aircraft or elevated location.
5
To react to a sudden, often unexpected, stimulus (such as a sharp prick or a loud sound) by jerking the body violently.
The sudden sharp sound made me jump.
noun
1
The act of jumping; a leap; a spring; a bound.
To advance by jumps.
2
An effort; an attempt; a venture.
Our fortune lies / Upon this jump.
3
A dislocation in a stratum; a fault.
4
An abrupt interruption of level in a piece of brickwork or masonry.
5
An instance of propelling oneself upwards.
The boy took a skip and a jump down the lane.
adv
1
Exactly; precisely
Thus twice before, and jump at this dead hour, With martial stalk hath he gone by our watch.
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