Mandrel Bent Share definition Flag When a boner is supressed to the extent that it becomes miss shapen and deformed. I got a boner in church and smashed down my package so the minister wouldn't see. Now I have a mandrel bent. Mandrel Bent by Jamie Brown February 4, 2004 0 0 Get merch Get the Mandrel Bent mug. Buy Now — $32.95 See more merch