Haggaplaster Share definition Flag A penis coming from the root word of plaster which means a body part and the root word of hagga which means to pee. "Cindy, I know you want my big and juicy haggaplaster!" Haggaplaster by Lila, leanna, and Emily. April 14, 2009 0 0 Get merch Get the Haggaplaster mug. Buy Now — $32.95 See more merch