The frequently used term "crooked erection" became inefficient and therefore had to be shortened into croner (crooked boner). Croner also refers to any object that resembles a crooked erection/phallus.
"Someone threw a rock at my groin when I was a kid and now I have a croner."
"That ogre carries his croner club every where he goes."
"If you come near me, I will beat you down with my croner."