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A fancy way of saying 'that’s a good idea' but with more ego and less brainpower. People use it like it’s a medal for thinking.
'A novel idea!' he shouted, even though he had no clue what it was.
'That’s a novel idea,' she said, while secretly copying the plan from her phone.
He got a standing ovation for suggesting they eat cereal for dinner. 'A novel idea!' the crowd cheered.