what the duece Share definition Flag An exlaimation of astonished confusion. Similar to the phrase "What the Hell" or "Holy Shit". Little Billie: "Mom the dog got stuck in the garden hose again!" Mom: "What the duece!" what the duece by PhilipRyan April 27, 2006 0 0 Get merch Get the what the duece mug. Buy Now — $32.95 See more merch