DA posse Share definition Flag DA posse is a gang of wannalags hoping to take on any nearby gang in their hood!!! Me and ma mate from the science are gonna round up some wannalags for DA posse to take on EBC o the weekend:p DA posse by Josh Stepkovitch January 11, 2008 0 0 Get merch Get the DA posse mug. Buy Now — $32.95 See more merch