El Viejo Paulino is a norteño comedy character associated with Multimedios, the Monterrey broadcaster behind TV Regia, and cállate baboso became his recognisable catchphrase. Fans clipped the shout from his appearances and passed it around as a standalone audio, especially in Mexican WhatsApp chats, where a two second telling off is more useful than typing one. From there it spread to soundboards and short video edits across the Spanish speaking internet. It survives because the delivery does the characterisation instantly, even for listeners who never saw the original broadcasts.