Laddums
You make someone say 'huh' or 'what' and then you scream 'laddums' like it's the most important thing ever
'What?' he said. I yelled 'laddums' and he got mad.
'Huh?' she said. I said 'laddums' and she rolled her eyes.
He said 'what' and I said 'laddums' and he walked out.