slosh around
(in something) 1. [for a liquid] to rush or splash around in an enclosure or container. The milk sloshed around in the pitcher and splashed over a little bit. The fluid sloshed around, making a splashing sound.
2. to move or splash through a liquid, usually standing on one's feet. Billy sloshed around in the wading pool. The kids have been sloshing around in puddles again.
slosh something around
to cause a liquid to rush or splash in a container. The chef sloshed the dressing around a few times and poured it on the salad. The chef sloshed around the dressing and poured it on the salad.