Slosh, also known as goo core, is a music genre that is an offshoot of 21st century noise music, characterized by free arrangements and digital textures, often with a sense of playfulness, cuteness, or bubbliness that references the euphoria of pop music without the structural formalities. Strains of slosh could be viewed as a response to some of the monochromatic abstract music of the early '00s.
When the terms "slosh" and "goo core" were devised, they were intended to describe an outpouring of noise music that was bubbly/playful like pop, but “without the structure".
Said of a female, "sloshing in their boots" or "sloshing in her boots" refers to a state of sexual attraction or arousal so extreme that they're "wet" (i.e., vaginally lubricated) all the way down to their feet.
The rippling noice made by a pan with water in it. When a small amount of water is added to a pot and gently tapped on another surface a rippling “whoosh” noice is made.