hang fire
1. To wait to take action. I know you want to start on that project, but hang fire until I get these questions answered by the boss.
2. To await further action. How many projects do you have hanging fire right now?
hanging fire
Delayed; undecided. This term comes from the seventeenth-century flintlock musket. Frequently an attempt to fire it would end with a flash in the lockpan, a depression that held the priming powder, which would fail to explode the main charge. Thus the gun was left hanging fire, that is, slow to fire a charge. See also flash in the pan.