Someone who snorts a lot of drugs, like the hoover in the Teletubbies, Noo-Noo who went about snorting everything.

A nunu is a boy who will call you and ask u to come over. When u go to his house he is not there why u ask because he is a nunu. By this i mean that yo bro is a nunu negative

A woman's vigina,

A pussy.

Another way of saying cute

And is pronounced as "noonoo"

Bangla term of penis

Huge, large in your face boobs

To be a "nunu" or to pull a "nunu", you have to cut someone out of your life. SNIP SNIP out of your life like a cold hearted bitch.