fly off the shelves

To sell very quickly, as though the items in question cannot be kept on store shelves. Good luck finding that doll between now and Christmas—it's been flying off the shelves. Stores just can't keep it in stock. These trashy gossip magazines are of such low quality, yet they always fly off the shelves. It's a real racket if you ask me! We had to order a second shipment of shirts because the first batch flew off the shelves!