Place it at the very end of a setup, once the other person has finished talking, so it acts as the final word. Follow it with Nelson's Ha-Ha! for a mocking finish, or put Oh My God Wow just before it to build up the unwanted explanation first.
關於此聲音
This two-second clip is a single Portuguese voice saying 'Não Interessa!' with a flat, dismissive delivery that cuts a conversation short. It feels blunt and funny because the refusal is immediate and absolute, with no explanation, softening or room for argument. The abruptness is the joke: a whole dismissal packed into one short phrase.