bulbousbutt Share definition Flag a bulbousbutt is what you’d call a banging ass where bubblebutt wouldn’t quite do it justice. Man, that bulbousbutt bitch was back in the squatrack again this morning - told ya to come to the gym with me! bulbousbutt by Robocourier July 29, 2022 0 0 Get merch Get the bulbousbutt mug. Buy Now — $32.95 See more merch