1. stop something from happening or continuing
pull the plug on the deal
If you were to 'pull the plug on something' literally, you would remove a device's power cable from its socket, thus depriving it of the electrical supply it needs to operate. This expression is used figuratively to refer to stopping support for something or ending support abruptly. The type of support is usually financial and directed towards a plan, business, or project. For that reason, this expression is mostly used in a professional context. Similar in meaning to pull the rug out from under someone.