poached duck Share definition Flag poached duck, noun. a ridiculously inside pitch that causes the batter to spin around with his arms all twisty like. Man, I killed Shane Vic last night with the poached duck to close out an 11 inning battle. poached duck by Big Z's Bullpen Express April 26, 2010 0 0 Get merch Get the poached duck mug. Buy Now — $32.95 See more merch