Blue-gum Share definition Flag A black person of the darker variety such that the gums are of a blue color. Billy-Bob: No officer, I ain't robbed the liquor store. It was a damn blue-gum what did it. Blue-gum by closetObamafan February 10, 2009 0 0 Get merch Get the Blue-gum mug. Buy Now — $32.95 See more merch