hump strap
n.— «Moving quickly, Hassing and Granath use two-wheeled dollies to move what seem impossibly high stacks of boxes through the drizzle. Granath unwraps his “hump strap” from his waist, using it to carry big, heavy boxes “without screwing up my back,” he says.» —“Packing, transporting everything you own goes easy with crew of experienced professionals” by Frank Bentayou Plain Dealer (Cleveland, Ohio) June 2, 2002. (source: Double-Tongued Dictionary)