Penile Knife Share definition Flag Use of a penis in love making to a woman during her period or by taking her virginity. Blood on the penis. Also known as Penis Knife. (Singing) My Penile Knife...my Penile Knife... (Long Pause) I stabbed you with my Penile Knife. Penile Knife by X_herb July 23, 2011 0 0 Get merch Get the Penile Knife mug. Buy Now — $32.95 See more merch