A bet or wager.
A risky venture.
A significant risk, undertaken with a potential gain.
To risk (something) for potential gain.
To take a risk, with the potential of a positive outcome.
To interact with equipment at a casino
To play risky games, especially casino games, for monetary gain.
A bet on some aspect of a game or competition that is not the main bet of the game or the prize of the competition; proposition bet.
An investment of time, money, or resources that reinforces one's commitment to a course of action.
An investment or risk undertaken by a company that is not part of its core business.