Top definition
The catchphrase of Rika from the horror game, anime and manga "Higurashi no Naku Koro ni". Now considered a meme among anime fans. Also spelled "Nipah" or "Niipah."
"Niipaa~"
"Niipah~"
"Niipaaaaaaaaaaaaaaaaaaaa!"
by CJ Blackwing March 10, 2008
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