Sentence:  Before long, Zarin developed a reputation as an extravagant "<WSD>high roller</WSD>" who routinely bet the house maximum while playing craps, his game of choice. Considered a "valued gaming patron" by Resorts, Zarin had his credit limit increased at regular intervals without any further credit checks, and was provided a number of complimentary services and privileges. 
Meaning of the word marked with <WSD> tags:  A gambler who wagers large amounts of money, usually in a casino.