Real Dictionary

parbuckle in American English
a sling for a log, barrel, etc., made by passing a doubled rope around the object and pulling the rope ends through the loop
to raise or lower by using a parbuckle
noun: a kind of tackle for raising or lowering a cask or similar object along an inclined plane or a vertical surface, consisting of a rope looped over a post or the like, with its two ends passing around the object to be moved
transitive verb: to raise, lower, or move with a parbuckle

parbuckle in British English
noun: a rope sling for lifting or lowering a heavy cylindrical object, such as a cask or tree trunk
verb: to raise or lower (an object) with such a sling