Nu Nu

A reaction to an occurrence so strange, you can’t fathom the words for such an abhorrent event

(In reaction to a surprising event) Nu Nu, are you normal?!

Nu-nus

Adjective. (Noo-nooz) An aggressive animal, tending to be small, acting in an almost hypnotizing manor; that otherwise, would cause bodily harm should you irritate it in literally any way.

See gif for reference.

Awe. Look at da Nu-nus! Awe he' so cute when hes not so angry.