Place it at the very end of a reaction clip, just after the provocation, then follow it with the Vine Boom Sound to close the scene with a firm full stop, and keep it away from longer dialogue so the dismissal stays the focus.
Über diesen Sound
This is a very short Portuguese voice clip in which a speaker says 'Eu não ligo', meaning 'I don't care', in a flat, unbothered tone that lands as a shrug in sound form. It feels dismissive without sounding angry, funny because it refuses the drama in front of it, and it works best as a cool, deadpan brush-off rather than a heated reply.