/ ˈkruːpieɪ; NAmE ; NAmE also -piər/ noun
a person whose job is to be in charge of a gambling table and collect and pay out money, give out cards, etc.
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WORD ORIGIN
early 18th cent. (denoting a person standing behind a gambler to give advice): French , from Old French cropier pillion rider, rider on the croup, related to Old French croupe , ultimately of Germanic origin and related to crop .