top hatting
n.— «The film, which played a part in all three men pleading guilty, showed “top hatting”—dropping chips on to a gaming table a split second after the roulette ball has dropped—in 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.» —“Gang guilty of swindling casinos with ‘top hatting’ deception” by Justin Davenport Scotsman (Glasgow) Aug. 9, 2005. (source: Double-Tongued Dictionary)