A quantity of a liquid; more than a splash.

“We added a slosh of white wine to the sauce.”

A sloshing sound or motion.

Slush.

(of a liquid) To shift chaotically; to splash noisily.

“The water in his bottle sloshed back and forth as he ran.”

(of a liquid) To cause to slosh

“The boy sloshed water over the edge of the bath.”

To make a sloshing sound.

“They were so completely soaked that they sloshed when he walked.”