shell game

From Wiktionary

Expression[change]

Expression
shell game

A shell game in The Conjurer, by Bosch
  1. A shell game is a game where one player tries to guess which of three small cups (or shells) a small object is hidden under after the other player quickly rearranges their positions.
  2. A shell game is a dishonest activity designed to make people expect one outcome, which is not the intended outcome.