Naff.... well there is a word I need to google.

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British slang, today meaning uncool, tacky, unfashionable, worthless... or as a softer expletive, in places where one might use "fuck" as in "naff off", "naff all", "naffing about".

Origins of the word are disputed, but it appears to have come from Polari (gay slang).

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Hmmmm... very educational.