"Chaser" is a popular term that can refer to different things, but it often describes a drink consumed after a shot of alcohol. For example, after taking a shot of vodka, someone might drink a soda or juice to help wash it down. This practice makes the experience more enjoyable and can help mask the strong taste of the alcohol. In another context, "Chaser" can refer to a character in stories or movies who pursues someone or something. This character often adds excitement and tension to the plot, as they chase after their goal, whether it's a person, treasure, or a dream.