Isekai stories, where a hero is transported to a fantasy world, turned slimes from low level enemies into beloved main characters during the 2010s anime boom. Online editors began isolating the squelchy movement sounds tied to those characters and reusing them far beyond anime clips. The sound now circulates in meme edits, gaming videos and short form posts whenever something needs to feel soft, bouncy and magically alive, keeping the joke readable even without any visual context from the original scene.