
The penny drops
Aha Moment
The phrase often describes a moment of sudden realization after confusion or misunderstanding.

I couldn't understand the riddle, but then the penny dropped, and it all made sense.
Casual Expression
Common in casual, conversational contexts. Can sound out of place in very formal or serious situations.

She chuckled when the penny dropped and I understood her prank.
British Origin
Primarily used in British and Australian English, may not be as widely recognized by American English speakers.

Our American friend looked puzzled until I said 'I get it!' and then the penny dropped.
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