UgNugg Share definition Flag A fucking trash teammate in a multiplayer game. Usually a random who is totally incompetent and does not understand how to play. "God UgNugg get the F*@$King flag!" UgNugg by pukuwu_ January 25, 2020 0 0 Get merch Get the UgNugg mug. Buy Now — $32.95 See more merch