The phrase comes from Russian internet slang style humor, where slysh ty works as a rough hey you opener and tumba yumba adds a made up rhythmic punchline. Clips like this spread through short video edits, messaging apps and soundboards because the line is short, quotable and easy to recognize even for listeners who do not speak Russian. Its appeal relies less on literal meaning and more on tone, rhythm and timing. That is why it keeps appearing as a reaction sound alongside other meme voice clips in compilations and streams.