If a liquid sloshes around or if you slosh it around, it moves around in different directions.
The water sloshed around the bridge. [VERB adverb/preposition]
The label recommends sloshing the mouthwash around in the mouth for 30 seconds. [VERB noun adverb/preposition]
The champagne sloshed and spilt. [VERB]
[Also
VERB noun
]Synonyms: splash, wash, slop, break