Shliop is the Romanised spelling of the Russian onomatopoeia for a slap, and the doubled form mimics two quick smacks in a row. Online, short slap sounds like this circulate as meme audio because they are instantly understood without language, making them easy to drop into edits, reaction clips and short-form videos across different countries. The clip stays popular because its rhythm is simple, repeatable and funny on its own, even when viewers do not know the original language behind the word.