High Roller
A high roller is a player who stakes significantly above the casino average. There's no universal threshold. At a mainstream online casino, "high roller" might mean €100 per spin. At a London Mayfair casino, it means five figures a hand, minimum. The label is relative to the room.
Casinos court high rollers hard because they generate outsized revenue per head. The perks reflect that: personal account managers, bespoke bonus terms, faster withdrawals on request, custom VIP tables, sometimes travel and hospitality at land-based partners. Offer a whale enough free hotel nights and the expected-value math on the casino's side still works out in the long run.
The risk on the player side tilts harder too. Sessions compress. A bankroll that would last a casual player a month can be gone in 20 minutes. High rollers who do this sustainably treat it as a budgeted hobby and keep playing cash firewalled from everything else they own. The ones who don't treat it that way usually don't stay high rollers for long.