A "dirty pour" is a technique used in acrylic pouring art where multiple colors of paint are combined in a single cup before being poured onto a canvas. This method allows the colors to blend and create unique patterns and effects as they flow together. The result is often a vibrant and dynamic piece of art. In a dirty pour, the artist typically layers the colors in the cup without mixing them thoroughly. When the paint is poured out, it creates a marbled effect, showcasing the different hues. This technique is popular among both beginners and experienced artists for its ease and the surprising outcomes it can produce.