milkshake
n.— «Van Clief’s comments came days after 17 people were indicted for an alleged plan to use a substance known in racetrack parlance as a “milkshake”—a mixture of bicarbonate of soda and sugar—to a racehorse in the first race at Aqueduct on December 18, 2003.» —“Alleged Mafioso charged in gambling scheme” in New York City Native American Times Jan. 17, 2005. (source: Double-Tongued Dictionary)