Laddums
When you get someone to say 'huh' or 'what' and then you say 'laddums' like it's the best thing you ever did
She said 'huh' and I said 'laddums' and she laughed at me.
He said 'what' and I said 'laddums' and he called me a fool.
They said 'huh' and I said 'laddums' and they all started laughing.