Scrubby bum Share definition Flag Scrubby bum is a term for someone who sucks real bad at video games, particularly player vs player activities. I hate playing call of duty with noob_gamer45, he is a big scrubby bum. Scrubby bum by Ulfricstormcloak February 17, 2019 0 0 Get merch Get the Scrubby bum mug. Buy Now — $32.95 See more merch