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    Daddy-O, sometimes spelled Daddio, is a beatnik slang term from the 1950s that means “cool dude” or “hip cat”.

    Daddy-O is the sort of word you imagine people around Jack Kerouac and Ken Kesey were using when talking about someone very cool and laid-back.

    Daddy-O has taken on a bit of retro-sarcasm in modern usage and is used to mock an elderly man who is still trying to be “with it”.

    Example usage:

    “Hay, Daddy-O, what’s with the blogging on your handheld?”.

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