Top Definition
Nin Na Bay, Singlish expression just like in English - BLOODY HELL!
NNB, miss the 1st prize lottery just by a digit.
by Luan Joo Kong July 31, 2009
9 Words related to NNB
Short for NI NA BU, a swear used when angry or in agony
NNB he juz punched my balls!
by Huahah November 03, 2004

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