In poker, to “chase” means to continue playing a hand in the hopes of improving it, despite having a weak hand currently. A player might “chase” if they are trying to make a particular hand, such as a flush or a straight, and need one or more specific cards to improve their hand.
The term can also be used to describe a player who is behind in chips and is making aggressive bets to try to catch up to the other players. Chasing can be a risky strategy, as it can result in a player losing more chips if they don’t improve their hand.