The term comes from the medical world where pulling the plug on the machines that are keeping people alive could literally result into death. It used to be an informal way or euphemism to say that someone is being left to die naturally by pulling out all the machines on the person. The phrase has caught on and now means killing the supply of things that are keeping a project / venture alive. [First half of 1900s] ⠀ 🏡 @English_House 🏡