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1.
The act of having or experiencing diarrhea. It was derived from the romanization of the Cantonese slang for "excreting fragmented poo" often used to characterize diarrhea.

The term was coined sometime between 2005 and 2008 by hiu.
That McDonald's I ate is really starting to give me 'nancy'.

Guys, I think I'm gonna have to take a nancy break!

I'll catch up with yall later, I have to go Oh Nancy!
by LVXS April 05, 2011