crou·pi·er 
(krpē-ər, -pē-ā′)
(krpē-ər, -pē-ā′)n.
An attendant at a gaming table who manages game play and collects and pays bets.
[French, one who rides behind another on a horse (obsolete), croupier, from croupe, rump, croup, from Old French; see CROUP2.]