Place it right after the foolish claim or excuse, then follow it with a shocked reaction for contrast, or a buzzer for a failed take, keeping the insult as the punchline of the sequence.
About this sound
This is a short German voice clip, lasting under two seconds, in which Pietro delivers the line 'Du bist ne Schlampe' in a direct, confrontational tone. The bluntness makes it feel funny and awkward at once, like a sudden insult dropped into a conversation.