Pull the plug
This is when we put a stop something or bring something to an end. It is often used when a business project or strategy is losing or going to lose money.
The company pulled the plug on the development of the new product when they discovered that market research showed that it would not sell.
Remember that you won’t do yourself any favours if you simply throw these idioms into conversation during your IELTS interview. You must practice using them appropriately before the exam.