high-roller

Noun

high roller (plural high rollers)

1. (Canada, US, informal) A gambler who wagers large amounts of money, usually in a casino.
   • They were all "high rollers" against faro, had plenty of money, and, if the cards came favorably, would "chaw up" a bank in double-quick time.1873, [John O’Connor], “Inventors”, in John Morris, editor, Wanderings of a Vagabond. An Autobiography, New York, N.Y.: Published by the author, →OCLC, page 178
2. (Canada, US, informal) One who has a lot of money and lives luxuriously.
   • The "Baron" bowed. This was a new complication, but it was all in the day's work. Of course, the whole thing was plain enough. Fatty Welch was "working" some swell guys who thought he was a real high-roller. Maybe he was going to pull off some kind of a job that very evening. Perhaps this big chap...1905 September, Arthur [Cheney] Train, “The Extraordinary Adventure of the Baron de Ville”, in McAllister and His Double, New York, N.Y.: Charles Scribner's Sons, →OCLC, page 59

   Synonyms:

   two week millionaire