run and gun

big gun

A person, group, thing, or course of action that is powerful, influential, or particularly effective.

break into a run

To start running.

common run

Ordinary persons, things, or events.

dry run

A practice or rehearsal; especially, one that goes through all the motions of a physical process but without the raw material or workpiece present.

dummy run

A trial or practice before the real attempt.

eat one's gun

To commit suicide, especially by use of a firearm discharged into the victim's mouth.

fire the starting gun

To launch or trigger an event or situation.

give it the gun

To cause a specific vehicle to accelerate; to open the throttle of an engine.