Place it just after the on-screen request for the item, as the first reply in the exchange. Follow it with No No Wait Wait to keep the stall going, then close the scene with Oh My God Wow when the owner finally gives up.
關於此聲音
This is a brief spoken Portuguese line lasting about a second and a half, spoken as a quick comeback when someone wants an item returned. It sounds casual and a little sheepish, like someone stalling for time rather than refusing outright. The tone is light and teasing, turning an awkward request into a joke instead of a confrontation.