Place it as the reply beat in a back-and-forth edit, after a no no wait wait moment builds the argument, then follow it with Nelson's Ha-Ha! to close the scene on the other person's reaction.
Über diesen Sound
A short 3.9-second voice clip of someone snapping 'STFU you scruff' in a blunt, dismissive tone. It lands as rude, funny and fed-up all at once, the kind of line that instantly ends a rambling argument and turns an annoying moment into a joke at the speaker's expense.