NBG Share definition Flag NBG="No Black Girls." The act of strictly not dating or have any sexual relations with a dark skinned girl. Its a choice of being NBG or not. "Sorry miss, im NBG so i will not go back to your apartment with you." NBG by Jwayze March 7, 2010 0 0 Get merch Get the NBG mug. Buy Now — $32.95 See more merch