Duffy

/ˈdʌfi/ proper noun, adjective (slang)

A surname of Irish origin; in some dialects, can mean dull or colorless.

From Irish 'Ó Dubhthaigh,' combining 'dubh' (black) and 'thighe' (from a house name), meaning 'descendant of Dubhthach.' Very common in Irish and Scottish families.

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