Top Definition
A colloquial term for Strongbow cider. Consumed by underage drinkers all over Britain.
I just necked a two litre of Nyaii! I think I'm going to vom.

Hey, what you drinking tonight? Oh, just a few bottles of Nyaii

Hi I'll have two bottles of Nyaii and 20 Lambert
by fatrickmcdoof September 12, 2010

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