The phrase comes from Russian speaking meme circulation, where short named character clips are shared as reusable reactions rather than full scenes. Salyak zabolel, meaning Salyak got sick, spread as a compact audio joke detached from any longer context, which makes it easy to drop into chats, edits and soundboards. Its appeal is the specific name paired with a very ordinary problem, so listeners treat it as an inside joke even without knowing Salyak personally. That ambiguity has helped it stay useful as a generic sick excuse sound.