In the world of card games, the term ‘ poker face meaning’ is often mentioned to describe the indescribable expression on the player’s face. The ‘ poker face idiom’ is then a symbol of maintaining a spirit and not showing true expressions in games. In Vietnam, it is understand that ‘ poker face meaning’ is not only for poker games and describe a people poker face. In the proverb, ‘poker face’ means to keep a spirit and not show true expressions, this state helping player have more advantages in any cases. Thus, ‘ poker face idiom’ is not a card game terminology or other legal meaning but contains a deep meaning about the ability to control emotions in everyday life in Vietnam. Understanding the ‘poker face meaning’ will help us become mature, behave well and control our emotions better.