Boomerang Boner Share definition Flag An erected penis that forms a sharp angle. Usually a 90 to 60 degree angle. How can a guy have sex with a boomerang boner like that? Unless he does it sideways. Boomerang Boner by Al-Pal113 February 4, 2010 0 0 Get merch Get the Boomerang Boner mug. Buy Now — $32.95 See more merch