Boomerang Bone Share definition Flag When one's penis curves abruptly during arousle, either to the left or right forming a ninty degree angle. Dude, I went to geometry class today. the teacher showed us his Boomerang Bone! Boomerang Bone by Piginablanket July 9, 2010 0 0 Get merch Get the Boomerang Bone mug. Buy Now — $32.95 See more merch