a penis. like if you pronounced it (pea-nus).
I really like you, and my nus seems to feel the same way.
(n.) a term of endearment similar to honey, baby, sweetie, or lovebug
You are the cutest little nu-nu I've ever seen.
A prefix applied to various styles of music since the mid or late 1990s. Especially found in "nu-metal" and "nu-rock": KoRn, Staind, Linkin Park and Disturbed are examples.
From a phonetic/perverted spelling of "new".