Blub-Blub Share definition Flag Defined as the sound to what one makes when they are submerged into water. Essentially drowning while producing bubbles. All I heard from Frank was blub-blub as he continued to drown. Blub-Blub by CutePenguin September 22, 2021 0 0 Get merch Get the Blub-Blub mug. Buy Now — $32.95 See more merch