This sound is associated with Lego Batman from The Lego Batman Movie, released in 2017. Short reaction clips of the character spread widely through meme edits, GIF captions, and fan compilations because his exaggerated confidence makes even a tiny laugh instantly recognizable. Online, people use this audio as a quick punchline for ego, irony, or playful villain vibes. It has stayed popular because the clip is short, easy to place in edits, and flexible enough for both movie memes and general reaction posts.