This is a colloquial expression, understandable to any frequenter of the casino or poker room.
Big Game – gameplay, which involves high rollers or VIP – clients.
It can take place in the VIP room or at a regular table. In such cases, casinos may even raise the standard limits.
For casinos, large bets are a chance to earn an impressive amount, but also a danger of losing financial resources. There are cases when one evening led to the complete collapse of the institution. Accordingly, the big game always attracts the special attention of the croupiers, pit bosses, managers and representatives of the security service.