Bung up Definition 1 of 2Pro Tip 1/3Physical Objects Used for tangible things that can physically be blocked or sealed. I need to bung up the holes in the wall to stop the draft. Pro Tip 2/3No Passage Implies that after being bunged up, nothing can get through, like light, water, or air. Make sure to bung up the bottle completely to avoid any leaks. Pro Tip 3/3Temporary Fix Often a makeshift or temporary solution to stop something from flowing or leaking. Just bung up the crack for now; we'll call a plumber tomorrow.