Place it at the end of a fail sequence, after the mistake is shown and just before the reaction shot, then follow it with the Oh No No No Laugh for a second wave of mockery, or cut to the Shocked Meme Sound if you want the target's stunned face to close the clip.
About this sound
This five-second voice clip delivers the line 'You are an idiot' in a blunt, taunting tone, followed immediately by a loud, drawn-out burst of 'HAHAHAHA' laughter. It feels mocking and playfully cruel, like being laughed at right after a silly mistake, which makes it sharp enough to sting a little while still landing as a joke among friends.