high-roller

GrishamのThe Brethrenを読んでいます。同著者のCasinoに出てきた単語 "high-roller" が次の様に出てきました。
The real estate agent he was meeting for lunch was a high-roller who took chances and cut corners, probably a crook. Quince began to make plans. The two of them would arrange a few shady loans; overappraise some land, lend the money, sell to a strawman, etc. He would know how to do it.