top hatting
n.β Β«The film, which played a part in all three men pleading guilty, showed “top hatting”βdropping chips on to a gaming table a split second after the roulette ball has droppedβin slow motion. The deception relies on the dealer, casino inspector, security staff and other players all being distracted at the vital point when the ball drops.Β» ββGang guilty of swindling casinos with βtop hattingβ deception” by Justin Davenport Scotsman (Glasgow) Aug. 9, 2005. (source: Double-Tongued Dictionary)