Definitions for unslingʌnˈslɪŋ
Random House Webster's College Dictionary
to remove (something) from being slung:
to unsling a rifle from one's shoulder.
Naut. to take off the slings of; release from slings.
Origin of unsling:
to take something from a hanging, or slung position.
The hunter unslung his rifle and took a bead on the hare.
to take off the slings of, as a yard, a cask, or the like; to release from the slings