This clip features one of the penguins from Madagascar saying coucou, the French greeting used when waving hello to someone. The penguins became breakout stars of the animated Madagascar films thanks to their deadpan teamwork and comic timing, and short voice lines like this one travelled easily to soundboards, memes and short-form videos. Because the word is short, friendly and easy to understand even without French, creators keep reusing it as a quick hello, a playful reveal or a light-hearted way to acknowledge the audience.