CACKBIRD Share definition Flag A Bird with a CACK-like appearance. The proclamation of such bird must be yelled, hence the typeset in capital letters. Guy 1: "Dude! look at that bird it looks like my cack!"Guy 2: "You mean a CACKBIRD!?" CACKBIRD by kultovdawn March 26, 2010 0 0 Get merch Get the CACKBIRD mug. Buy Now — $32.95 See more merch