buy a lemon
to buy something (especially a car) that turns out to be defective or worthless · a product that is found to be faulty after purchase
What's the situation?
Ever bought something shiny and new, only for it to break down right after? 😫 That frustrating feeling? That's when you've "bought a lemon"! It's often used for cars, but you can use it for any faulty big purchase, like a new appliance or gadget.