high roller
US /ˈhaɪ ˈroʊlər/
UK /ˈhaɪ ˈroʊlər/

1.
豪赌客, 大亨
a person who gambles or spends large sums of money
:
•
The casino caters to high rollers with exclusive VIP rooms.
赌场为豪赌客提供专属贵宾室。
•
He's known as a high roller in the business world, always making big investments.
他在商界被称为大亨,总是进行大笔投资。