1. to spill or splash (a liquid) copiously or clumsily, 2. to agitate in a liquid (eg. slosh clothes in a solution of bleach and detergent), 3. to splash, wade, or flounder in water or another liquid
onomatopoeia: 1. the naming of a thing or action by a vocal imitation of the sound associated with it (as buzz, hiss) 2. the use of words whose sound suggests the sense