Wiktionary
fire off
vb. (context transitive English) To perform a task rapidly, often unexpectedly.
Usage examples of "fire off".
Just get in range and fire off a few broadsides, then scamper—.
Stomping, hotfooting in the back of the truck, scraping the boot against the slat boards, he finally got the fire off his boot.
It was then that Ivor had gestured Dave over to join a meeting around a smaller fire off to the side of the room.
A detachment of Marines and a gun crew were on board to fire off a cannon salute.
As soon as we come out of the kick, we should fire off about a thousand copies of the recordings.
Just get in range and fire off a few broadsides, then scamper—.