high rollers

Grishamの短編小説Casinoを読んでいます。離婚したStellaとSidney、Sidneyは元妻のStellaに未練がありますが、次第にギャンブルにはまっていきます
Of the twenty blackjack tables, only three catered to the high rollers. Their minimum bets were $100 a hand, and these tables generally saw little traffic. Sidney assumed a chair at one, tossed out a bundle of cash, and said, “Five thousand, in $100 chips.” The dealer smiled as he took the cash and spread it across the table.
"high roller" の意味を調べます。
・Oxford English Dictionary: A person who gambles or spends large amounts of money.: Think casino gambling and you think high rollers playing high-stakes games, dropping thousands of dollars a night.
・McGraw-Hill Dictionary of American Idioms and Phrasal Verbs: a big gambler who risks much money; anyone who takes risks. (Refers to rolling dice.) Rocko is a high roller and isn’t afraid to lose some money.
なるほど "roller" はサイコロを転がす人の意味から来ているのですね。