Definition of high roller noun from the Oxford Advanced Learner's Dictionary


high roller

BrE BrE//ˌhaɪ ˈrəʊlə(r)//
; NAmE NAmE//ˌhaɪ ˈroʊlər//
(North American English, informal)
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a person who spends a lot of money, especially on gambling Word Originwith reference to rolling dice.
See the Oxford Advanced American Dictionary entry: high roller