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A Smithy is a twenty-pound note, and it’s named after that old farty economist, Adam Smith. It’s like having a twenty in your hand, and it’s just there to remind you how much of a twat he was.
I just got paid and I'm holding a Smithy like it’s the last piece of bread in the world.
My mum gave me a Smithy for my birthday, and I still haven’t forgiven her.
That £20 note is a Smithy, and I’m gonna spend it on chips and disrespect.