Place it right after the bad idea appears, then follow it with SpongeBob Fail to underline the rejection, or start with Dun Dun Dun before the refusal for extra dramatic weight.
このサウンドについて
This is a short Brazilian Portuguese voice clip built around the slang line 'não dá, mano, é cordão, mano,' spoken as a fed-up refusal. It lands with a funny mix of disbelief and resignation, like someone closing a conversation with a single dismissive line. The delivery makes it feel like a quick, relatable brush-off for everyday chaos.