Place it straight after the daft claim, before any reply, so the insult answers the moment itself. Follow it with Damn for a beat of disbelief, then Nelson's Ha-Ha! to turn the put-down into a shared laugh, keeping the insult as the centre of the exchange.
Об этом звуке
This is a short spoken insult lasting just under three seconds, delivered in a clipped, mocking tone as the words 'U stupid little plonker' land one after another. It feels teasing and dismissive rather than angry, like a playground put-down aimed at a daft remark. The British slang gives it a cheeky edge that makes the jab land as a joke instead of a real insult.