Slosh about Definition 1 of 3Pro Tip 1/3Physical Movement Used to describe messy movement of a liquid, often within a container. She walked quickly, coffee sloshing about in her mug. Pro Tip 2/3Noisy Implication Implies noise made by the liquid while moving around. As the boat rocked, the sound of the wave's sloshing about filled the air. Pro Tip 3/3Care Required Suggests caution to prevent spilling or making a mess. Hold your soup bowl carefully to avoid sloshing about.