Short horn blasts became a staple of online editing during the era of montage parodies and over the top reaction videos, where exaggerated effects were layered for comedy. The shoutout horn borrows that same energy from the MLG air horn tradition, but it is used more specifically to introduce a person or announcement. Streamers, editors and meme pages adopted it as a quick audio marker for hype, and it spread through short form clips and soundboards. Its brevity keeps it useful, because it signals celebration without needing any explanation or setup before it.