“Bait and Switch (adjective): Describing or pertaining to advertising that offers a product insincerely, with the true intention being to sell another, more expensive or profitable product.
‘Ads that deceive or claims that can’t be backed are no-nos, and techniques such as “bait and switch” in which goods are offered to lure customers to buy higher-priced substitutes are also verboten.’ Bernice Kanner, New York Daily News”
Excerpted from: Grambs, David. The Random House Dictionary for Writers and Readers. New York: Random House, 1990.