The phrase ku ku is the Russian equivalent of peekaboo, traditionally called out during hide and seek games and when surprising small children. This longer clip built around a call to Dasha circulates through Russian language soundboards and short video edits, where its meaning is understood even without context. Because the exact original recording is not well documented, the sound is known mainly by its transliterated title and its use as a playful reveal cue, shared in chats, meme compilations and reaction videos rather than tied to a film or song.