The act of stretching out the scrotum under the penis to create a comfortable resting place. This can easily trasition into a sackoline by shaking up and down
Joe's sack hangs so low I bet he can make a king size banana hammock for his sling.
A secret Gentlemen's Club ritual that occurs every new year in which high-classed men will group together and 'wiggle' to "I'm sexy and I know it," by LMFAO, in nothing but a pair of banana hammock undergarments.