N.V., NV, is extreme conservative pyoor
vegetarian Brahmin/ish terminology that's actually an abbreviation of the word, non-vegetarian.
"Non-veg" is a term so non-veg, that saying the term itself defiles one. This is an example of recursion. But I digress.
Grandmothers who cannot get themselves to say chicken, mutton, or even "non-vegetarian", refer to neighbours and other dubious smells as, "NV".
1: *whispering frantically* That next door Mr. Mani is taking home something in black plastic cover!
Ajji 2: That must be one quarter ma.
Ajji 1: (disappointed) Oh. I thought it was *making cutting gestures with hand* NV.