umbooku Share definition Flag the act of reaching back to your african ancestors with a victory word; black slang for victory; another name for being the "best" man walks into a supermarket black man says"umbooku!" the white people clap and give him praise umbooku by tmaih April 15, 2008 0 0 Get merch Get the umbooku mug. Buy Now — $32.95 See more merch
