palm off

verb

To offer or put into circulation (an inferior or spurious item): fob off, foist, pass off, put off. See honest/dishonest.

Pass off by deception, substitute with intent to deceive, as in The salesman tried to palm off a zircon as a diamond, or The producer tried to palm her off as a star from the Metropolitan Opera. This expression alludes to concealing something in the palm of one's hand. It replaced the earlier palm on in the early 1800s.

To misrepresent inferior goods of one producer as superior goods made by a reputable, well-regarded competitor in order to gain commercial advantage and promote sales.

The doctrine of palming off is applied to the particular facts of a case in which the defendant is accused of engaging in unfair competition against the plaintiff.

The verb has one meaning:

Meaning #1: sell as genuine, sell with the intention to deceive
  Synonyms: foist off, fob off