A penis that tilts, curves, bends in any one direction, it is never straight. Hookshanks can be any size but they usually come big. Sometimes the hookshank can be good , depending on the curve of the shaft, but sometimes the hookshank can make you as dry as the desert.
Girl: "That guy over there has a total hookshank."
Friend: "You fucked a hookshank?! How was it?"