Poker is a card game that involves betting with chips and keeping a straight face. You can also play poker online and make any kind of face you want. Additionally, a poker is a tool you keep by a fireplace.
Two or more people with a deck of cards can play poker, which has many variations. Some poker games involve several rounds of betting, discarding, and being dealt new cards. Having a "poker face" means remaining expressionless, as if you were hiding the fact that you've got a winning hand of cards. A completely different kind of poker is the long metal fireplace tool that you use to stir up the fire, also called a fire iron.