The phrase is Russian slang, with 'khlopnuli' implying someone was popped, taken out or killed, and 'opa' adding a light interjection of surprise. With no confirmed original source, the clip circulates online as a short voice meme on Russian-speaking soundboards and gaming edits. Its brevity and clear tone helped it spread into kill compilations, fail montages and chat reactions, where it functions as a quick verbal cue that something abrupt and unlucky has just happened to someone off screen.