anaconstrictor Share definition Flag a very large, gigantice penis that takes up the whole leg, and if it doesnt the it does not equal to an anaconstrictor "William's anaconstrictor, they used it as his leg when it was amputated!!!" anaconstrictor by Channing February 28, 2005 0 0 Get merch Get the anaconstrictor mug. Buy Now — $32.95 See more merch