What is nee naw?

Polices.

"Let's go, the nee naw siren blasting bitches are here!"

nee naw - video

Nee naw - what is it?

A state of commotion or alarm
(Like a siren)

Why is he causing such a nee naw right now?

What does "nee naw" mean?

It means bed/sleep/hit the hay/nap/Zzz, etc (you get the idea).

I'm gonna go to nee-naw now.

Nee naw - what does it mean?

that lad over there is a nee naw