Place it right after the loudest line in a scene, then follow it with No No Wait Wait when the speaker tries to continue, or let Silence I Kill You close the exchange if nobody backs down. Keep it as the punch in a tight reaction edit, not as background filler between other scenes.
About this sound
This is a short Portuguese voice clip, just under five seconds long, in which Fernando cuts in with a sharp shh and tells someone to be quiet in blunt, profane language. The delivery is direct and confrontational, which makes it feel funny and satisfying when aimed at loud talk, yet awkward enough to sting. It works as a quick spoken shutdown rather than a gentle request for silence.