The phrase designates a specific type of casino game. It’s a multi-reel slot machine that allows players to activate and play multiple base games simultaneously. This distinctive characteristic provides increased opportunities for winning combinations on each spin.
These gaming machines have gained popularity due to their innovative gameplay mechanics and the potential for enhanced entertainment value. The ability to play multiple games concurrently introduces a layer of complexity and excitement appealing to many slot machine enthusiasts. They represent an evolution in slot machine design, moving beyond single-game experiences to offer a more immersive and potentially rewarding form of gambling. Historically, their introduction marked a significant shift in the slot machine industry, responding to player demand for more dynamic and engaging games.