Car horns have been a standard traffic signal for over a century, designed to be heard instantly over engine and street noise, and that same urgency made the short beep a staple sound effect in cartoons, games and online edits. Unlike the exaggerated MLG AIR HORN used for montage parodies, this beep stays realistic and brief, so creators use it for everyday driving gags, impatient driver characters and sudden near-miss jokes. Its meaning needs no setup, which is why it keeps appearing in memes, animations and short-form videos.