Uncle Hummer Share definition Flag When a person wraps a pair of balls in tin foil, puts them in their mouth and hums the Star Spangle Banner. She gave me an Uncle Hummer last night while we watched the fireworks. Uncle Hummer by MidniteMae September 25, 2023 0 0 Get merch Get the Uncle Hummer mug. Buy Now — $32.95 See more merch