Place it at the end of a rambling clip, right after the last pointless sentence, so it closes the scene. Follow it with Awkward Crickets to let the moment hang, or put Chipmunk Laugh before it when the speaker is already being silly.
Sobre este som
The clip is a short Portuguese voice line, about two and a half seconds long, spoken in a blunt, exasperated tone as the speaker tells someone to shut up. It lands as funny and dismissive rather than angry, with the casual phrasing making the rebuke feel playful. The direct delivery gives it a sharp, chatty edge that works as a quick put-down.