loose off
verb1
Ambitransitive, Informal to fire (a weapon, or ammunition); to shoot (using a firearm)
- They loosed off a couple of rounds at the enemy.
- More likely, it was the prospect of meat. Curwen was by now craving a juicy roast – 'even seal chop' – and was always loosing off at tickleasses and harps.2006, John Gimlette, Theatre of Fish: Travels Through Newfoundland and Labrador, page 225:
2
Archaic to unfasten, to loosen (chains, bonds, etc.)