sell somebody/buy a pup

buy a pup

slang To buy something that ultimately proves to be worth nothing or less than promised. Primarily heard in UK. I'm sorry, but that's definitely not an authentic Louis Vuitton bag. You've bought a pup, my friend. He told us he has years of experience in this field when we hired him, but he acts like this is his first time handling accounts like this. I'm starting to think we bought a pup.
See also: buy, pup

sell (one) a pup

To sell or pass off something to someone that ultimately proves to be worth nothing or less than promised. I'm sorry, but that's definitely not an authentic Louis Vuitton bag. They sold you a pup, my friend. He told us he has years of experience in this field when we hired him, but he acts like this is his first time handling accounts like this. I'm starting to think he sold us a pup.
See also: pup, sell

sell somebody/buy a ˈpup

(old-fashioned, British English, informal) sell somebody or be sold something that has no value or is worth much less than the price paid for it: I’m wondering whether this really is a genuine Rolex. Do you think I’ve been sold a pup?The idea behind this idiom seems to be that someone dishonestly sells a young dog with no experience to someone who is expecting a more valuable older trained dog.
See also: buy, pup, sell, somebody