Put it right after the offending line in an edit, as the cut that ends the exchange. Follow it with the Bruh sound as the next reaction, or lead into Emotional Damage when the roast needs a bigger finish. Keep it as the single interruption in a short clip.
About this sound
A very short voice clip, lasting about a second, in which someone snaps “shut your mouth” in a harsh, irritated tone. The delivery is blunt and confrontational, landing like an instant verbal slap that cuts a scene off abruptly. It feels funny, awkward and a little over the top, making it a sharp punchline for bad takes, annoying chatter and oversharing.