slinging a deuce Share definition Flag The act of taking a dump. Comes from the phrase "number 2" hence the term deuce. That guy is such a tard that he takes his laptop with him while he's slinging a deuce. slinging a deuce by CalStabn September 22, 2005 0 0 Get merch Get the slinging a deuce mug. Buy Now — $32.95 See more merch