Be sold a pup British old-fashioned informal slang
The verb "buy" can substitute for "be sold". A "pup" is a puppy or young dog and is probably being contrasted with an animal that is older and does not need to be trained before being put to work.
If someone "is sold a pup", he/she is conned into buying something that has little worth on its supposed prospective value.
You should take into consideration when buying a high-end item. Just in case you're sold a pup.
A: "Your pair of Jordan looks cool." B: "I was sold a pup, these are not authentic. Anyway, thanks."
Consumers nowadays are more cautious about shopping in order not to be sold a pup.
The verb "be" should be conjugated according to its tense.
The expression is first recorded in 1901.
People tend to like forbidden or illegal things just because they are forbidden or illegal.
He must have believed that stolen fruit is the sweetest, and he, therefore, cheated on his partner.