Put it at the end of a short exchange where Caio has just finished talking, so it acts as the punchline rather than the setup. Follow it with a Bruh reaction for a deadpan beat, then Emotional Damage if you want the joke to escalate into a full roast of his nonstop talking.
Über diesen Sound
This is a short Portuguese voice clip, just under three seconds long, in which someone tells Caio to shut his mouth in a blunt, exasperated tone. It lands as a funny, confrontational shutdown, the kind of line that cuts through rambling and makes a room laugh at the target's expense. Its directness makes it instantly recognisable to Portuguese speakers, even without any other context.