Place it at the end of a failed claim or excuse in your edit, right before the payoff shot. Follow it with the sad trombone for a flop, or swap in nope avi for a second, firmer rejection in a montage.
About this sound
This is a sub-second voice clip of German rapper Shindy saying 'Ich glaube nicht,' meaning 'I don't think so' in German. The delivery feels blunt, doubtful and a little dismissive, like an instant shutdown to a claim you are not buying. It lands as a dry reaction rather than an argument.